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Decision Fatigue Exhausts Self-Regulatory Resources — But So Does Accommodating to Unchosen Alternatives

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RUNNING HEAD: SELF-REGULATION AND CHOICE
Decision Fatigue Exhausts Self-Regulatory Resources —
But So Does Accommodating to Unchosen Alternatives
Kathleen D. Vohs
University of British Columbia
Roy F. Baumeister
Florida State University
Jean M. Twenge
San Diego State University
Brandon J. Schmeichel
Florida State University
Dianne M. Tice
Florida State University
Jennifer Crocker
University of Michigan
Self-Regulation and Choice, p. 2
Abstract
Effortful choice is costly, but so is accommodating to choices made by others. In five studies,
participants who made a series of choices regarding consumer products, college courses, or course
materials subsequently showed poorer self-regulation (measured in terms of task persistence, task
performance, and pain tolerance), as compared to people who viewed or rated similar options without
making choices. In two additional studies, people were better at self-regulation (measured in terms of
physical stamina and speed-accuracy trade-offs) after they had performed a task they had chosen, as
compared to performing a task chosen by others. A limited resource model can explain why people
regard choice-making as stressful yet generally prefer to have choices.
Self-Regulation and Choice, p. 3
The difficulty in life is the choice.” --George Moore, The Bending of the Bough, 1900
The rich complexity of human social life is partly attributable to choice. Each day, millions of
people make decisions that will have lasting effects on their lives. Although choices are often
described as painful, agonizing, difficult, and by other terms that connote adversity, people who lack
choices tend to see their situations as even more aversive. Indeed, the restriction of freedom (through
jailing or other confinements) has long been used in human society as a severe form of punishment.
Conversely, the worldwide shift toward democracy that has been one great theme of the late 20th
century (Fukuyama, 1992) can be seen as a broad-based insistence on having more choices.
There is no denying that choices have proliferated, in terms of the number of decisions one can
make in life or even throughout a day. The diversity of product selection has expanded exponentially,
such that the average American supermarket in 1976 carried 9,000 different products, whereas fifteen
years later that figure had ballooned to 30,000 (Waldman, 1992). The average produce section alone
had risen from 65 items to 285 items. The coffee shop chain Starbucks boasted in 2003 that it offered
each customer 19,000 “beverage possibilities” at every store, and this was before their new
“superheated” option multiplied the number even further. Approximately 50,000 new products are
introduced every year in the U.S., whereas the number 30 years ago was only a few thousand.
Has the proliferation of choice uniformly made life easier and better? Iyengar and Lepper
(2000) found that people who had more choices were often less willing to decide to buy anything at all,
and their subsequent satisfaction was lower when they had been confronted with 24 or 30 options than
when they faced six options. Such findings suggest that choice, to the extent that it requires greater
decision-making among options, can become burdensome and ultimately counterproductive. Schwartz
(2000) denounced the stresses and others costs of increased choice as “the tyranny of freedom.”
We thus have a potential paradox. People who lack choices seem to want them and often will
fight for them. Then again, people find that making many choices can be aversive. The purpose of the
present manuscript was to test two seemingly competing hypotheses about choice, derived from a
Self-Regulation and Choice, p. 4
limited resource model of psychological functioning. The first hypothesis centers around decision
fatigue: the notion that making choices can be effortful and can therefore deplete resources. The
second hypothesis is that when one does not have choice, even though one might be spared the
depleting effect of choosing, one may have to expend resources to adjust oneself to unchosen
circumstances. Thus, we propose that choice is a two-sided coin for executive functioning: Making
choices is taxing, but so is accommodating to the choices of others.
Choice and Control
By some analyses, human life is full of constant choices, insofar as an alternative is available to
nearly every action (Sartre, 1956). We use the term choice in a more limited sense, however, to refer to
choices made by a conscious consideration among alternatives. Most of the time people proceed by
routine, habit, and automatic processes (Bargh, 1989; Bargh & Thein, 1985). To say that a professor
chooses to go to her office each day, because in principle she could stay home or get another job is
misleading in our view: Most likely she does not go through a conscious consideration of alternatives
each day.
Our point is simply that the contemplation of alternatives and selection among them is a
meaningful and effortful psychological act. It is a form of exerting control: One can decide the
outcome of a particular situation. Indeed, in some views the capacity to make flexible choices based on
new information is one of the driving forces behind the evolution of basic cognitive processes
(Tomasello & Call, 1997). That is, simple organisms behaved according to fixed action patterns, by
which their biological programming dictates a single and inflexible response. More complex organisms
may act on the basis of operant conditioning, so that current behavior is somewhat flexibly shaped by
prior consequences of like behavior. The most advanced form of choosing involves weighing
information about currently available options to select the option that seems most promising. This
response would be the most flexible, and potentially the most adaptive in terms of promoting survival
and reproduction, but it requires the most elaborate information-processing apparatus and the most
pliant behavior control system — so, in a sense, it is costly.
Self-Regulation and Choice, p. 5
Strength and Ego Depletion
Recent findings have begun to suggest that many of the self’s activities depend on a common
resource, akin to energy or strength. The self’s executive function is the agent that makes choices and
decisions, initiates and controls action, and regulates the self by operating on its inner states (see
Baumeister, 1998). All of these important activities seem to draw on this common resource, which may
easily become depleted.
We define self-regulation as the self exerting control to change its own responses in an attempt
to pursue goals and standards. These responses include changing one’s emotional state, regulating
thought processes, persisting at a task despite a strong desire to quit, and overriding impulses. The
goals and standards include ideals, morals, norms, performance targets, and the expectations of other
people. A series of studies has provided evidence that some psychological resource is depleted by acts
of regulating the self. Muraven, Tice, and Baumeister (1998) and Baumeister, Bratslavsky, Muraven,
and Tice (1998) showed that performing one act of regulating the self impaired performance on a
subsequent, seemingly unrelated act of self-control. For example, resisting temptation, stifling
emotional distress, or suppressing thoughts caused people to quit earlier on a frustrating task, show less
physical stamina, and be unable to refrain from laughing at a humorous scene. Presumably, the first act
of self-control depleted some resource that would have been needed to perform better at the second act
of self-control. Depletion of the self’s resources has been linked to multiple behavioral problems,
including overeating by dieters (Vohs & Heatherton, 2000), prejudicial responding (Richeson &
Shelton, 2003), inappropriate self-presentation (Vohs, Baumeister, & Ciarocco, in press), and
intellectual underachievement (Schmeichel, Vohs, & Baumeister, 2003).
These studies of self-regulation are relevant because they involve the self’s executive function,
which is to say the inner agency that exerts control and also makes choices. Baumeister et al. (1998)
suggested that the resource involved in self-regulation might be the same one needed for other
activities of the executive function, such as choice-making. In one study, making a responsible choice
to perform a counterattitudinal behavior (as in dissonance research; Linder, Cooper, & Jones, 1967)
Self-Regulation and Choice, p. 6
depleted the ego resource, as shown by quitting more rapidly on a subsequent figure-tracing task.
Although encouraging, those results do not amount to a strong or clear test of the view that making
choices depletes the self’s resources. The reliance on a dissonance procedure could entail that
dissonance-reduction processes were activated, and these could have depleted the self’s resources.
Dissonance often invokes a sense of responsibility for undesirable consequences (Linder et al., 1967),
and this also may have drained the self’s inner strength. Hence the focus of the present investigation
was to establish the role of the self’s resources (specifically self-regulatory strength) in choice.
The strength model of the self’s executive function has two aspects relevant to the present
discussion. First, this resource is used for a broad variety of regulated activities. The same resource is
used for controlling thoughts, modifying emotions, overriding impulses, performance regulation, as
well as active choosing. Second, this executive resource is fairly limited, so that even relatively small
expenditures translate into an impaired ability to execute executive responses later.
Choice Can Be Depleting
The current work tests the hypothesis that there is a hidden cost to choosing beyond
responsibility for outcomes and thinking about options. Specifically, the process of choosing may itself
drain some of the self’s precious resources, thereby leaving the executive function less capable of
carrying out its other activities. Decision fatigue can therefore impair self-regulation.
A thought-provoking review paper by Burger (1989) concluded that the quest for choice and
control is in reality somewhat limited. In many situations, people prefer not to have control, such as
when someone else can do the job better. Individual differences are also apparent: Burger pointed out
that even in conditions in which most people prefer control, there is generally a minority of people who
choose not to have control. It seems that for these people, the burden of responsibility that goes with
choice is simply too great. Even when the burden seems trivial, some people still want to avoid it.
There are multiple reasons people may seek to avoid choice, not the least of which is reluctance
to be held responsible for negative outcomes stemming from one’s decision. Another reason, however,
may be that the decision process itself is costly, insofar as it consumes valuable resources. In
Self-Regulation and Choice, p. 7
particular, people may avoid choosing so as not to conserve their powers of self-regulation and other
executive functions. This valuable resource is limited, and so conserving it when possible would be
prudent. If choosing depletes this resource, it would be adaptive for the self to pass up unnecessary
choosing, unless one is certain that there will be no further demands on the self for a while.
There are several reasons to think that choosing would deplete the self’s strength. Self-
regulation presumably consumes resources because the self must override one response and then
substitute a different response, and energy is needed to perform these interrupt and initiate functions.
Choosing may also involve an energy-consuming transition. The Rubicon model of action (Gollwitzer,
1996) outlines two mindsets that people move through serially. The deliberative mindset allows the
person to consider and weigh various options and the implemental mindset enables the person to
pursue the selected course of action. To move from the first mental mode to the second involves a
termination of the deliberating process and then an initiation of actions in pursuit of the chosen option.
In that sense, choosing is also not equivalent to the cognitive process of deliberating. The
philosopher Searle (2002) has discussed this difference at some length and argues that rationality
presupposes some degree of free will (or purposeful control over behavior) because rational analysis is
functionally useless unless one can act based on the outcome of the analysis. Searle further emphasized
that people can recognize multiple reasons to behave in a certain way but still not perform the
behavior, again indicating that contemplating and choosing are separable steps. Converging evidence
comes from Damasio (1994), a neuropsychologist who observed that certain brain-damaged patients
with emotional deficits can and do engage in sophisticated (and accurate) cognitive deliberations, such
as lengthy ruminations about the costs and benefits of several options — but they often cannot bring
themselves to finally make a choice.
In sum, we reasoned that making a choice involves a particular intrapsychic act. This step,
which in some way commits the person to a course of action, requires an effortful inner process. As
such, we hypothesize that it consumes some of the self’s limited supply of energy, thereby rendering
the resource less available for future self-directed activities. The first series of studies in this
Self-Regulation and Choice, p. 8
investigation was designed to test the hypothesis that acts of choice would produce a state of ego
depletion that would be discernible in impaired self-regulation subsequently.
Lack of Choice Can Also Be Depleting
It is also clear that people like to have choices. Choice and control reduce the stress of
outcomes and make life situations more agreeable (e.g., Deci & Ryan, 1995; A. Campbell, 1981;
Glass, Singer, & Friedman, 1969). Deprived of choice and control, people exhibit strong negative
reactions, ranging from learned helplessness to aggressive reactance (Brehm, 1966; Seligman, 1975).
They may also respond to a lack of control by developing illusions of control (Langer, 1975) or by
seeking alternative, secondary forms of control (Rothbaum, Weisz, & Snyder, 1982). Most broadly,
one trend in world history is an overall increase in choice, including the proliferation of consumer
options, the shift from parentally-arranged marriages to self-chosen partners, and the political
revolutions and movements in which people vociferously demand more (never less) freedom.
Whatever the drawbacks or burdens of choosing, people want to be able to choose, and they express a
corresponding dislike of situations where they have no control or no choice.
The strength model of the self’s executive function can offer an explanation for some of the
negative effects of lacking choice. Rothbaum et al. (1982) distinguished between primary and
secondary control, which were aimed at creating harmony between self and environment. Primary
control involves altering the environment to suit the self, whereas secondary control involves altering
the self to fit the environment. Secondary control therefore depends heavily on self-regulation, insofar
as it entails changing the self. When the self lacks choices or control, it must generally accept the
environment as it is and consequently its main option for creating harmony with the environment is to
alter the self. This strategy requires energy and effort because, by definition, the external world is not
aligned with the self’s preferences.
In principle, there could be an ideal solution: Someone else would choose for you exactly what
you would most like to have, and thus you would be relieved of the burden of choosing while also
getting just what you want. Some people may expect their parents or romantic partners to perform that
Self-Regulation and Choice, p. 9
function (cf. Iyengar & Lepper, 1999), but in practice it is unclear how consistently this solution
works. Hence when one does not have choice, one must adjust oneself to accommodate to the dictates
of other people or external demands. Consequently, we expect that the self-regulation required for this
type of adjustment should be depleting.
Hence, we tested a second hypothesis in this paper related to the depletion resulting from self-
chosen versus other-chosen activities. We predicted that when choices are made for oneself by
someone else, self resources will become depleted by the attempt to accommodate to the assigned
course of action, even though one was spared the regulatory strain of choosing.
Present Investigation
This investigation sought to demonstrate both the costs and benefits of having choice.
Experiments 1-5 were conducted to address the first hypothesis, of whether acts of decision-making
tax the regulatory system. Experiments 1-4 took place in the laboratory, and in these studies
participants in the crucial condition were instructed to make a series of choices. The choices were
made meaningful and personally relevant. Afterward, self-regulatory resource depletion was assessed
by having participants perform a task that required self-control. We predicted that those who made
many choices in the first task would be more depleted and therefore perform worse on the second task,
relative to those who had not made frequent choices earlier. Experiment 5 was a naturalistic study in
which participants at a shopping mall were asked about the extent to which they had engaged in
decision-making throughout their shopping trip that day. Subsequently, shoppers’ performance on a
self-control task was measured. We predicted that making many personally involving choices would
result in subsequent impairments in self-regulation.
Experiments 6-7 were conducted to address the second hypothesis, that performing an act that
was chosen by someone else would be more depleting than a self-chosen act. Participants were given
the choice to perform a task or were assigned to it; later, self-regulatory resource depletion was
assessed by asking them to engage in a self-control task. We predicted that participants who did not
choose their earlier task would have poorer regulatory abilities and therefore be less effective during
Self-Regulation and Choice, p. 10
the subsequent regulatory task, compared to those who had chosen their earlier task.
EXPERIMENT 1
Experiment 1 was a preliminary study designed to justify the assumptions behind the choice
procedure that was to be used in Experiments 2-4, and it also validated a self-report measure for in
Experiment 5. In Experiment 1, we assigned people either to make a series of binary choices between
products or to report their usage of the same products, in order to confirm that people do make more
effortful, self-involving choices in the high choice condition than in the no-choice condition.
The choice condition was designed to mimic some aspects of choosing in everyday life. In
daily life, most people make a multitude of minor choices. (Of course, people do make major,
momentous choices such as whether to marry or divorce, but for ethical and pragmatic reasons we did
not include such momentous choices in the present studies.) Some of these choices have consequences,
such as the dieter’s decision to pass up the fresh fruit and instead devour the fattening dessert, whereas
others have few or no consequences, such as deciding to wear the black rather than the gray skirt with
the white blouse. In Experiment 1, participants in the high choice condition were asked to make a
multitude of choices between products, and at least one of these choices would determine which item
they would receive. Thus, participants’ choices had potentially real (though relatively minor)
outcomes.
Method
Participants
Participants were 34 undergraduate students (20 male) who participated in exchange for partial
course credit.
Procedure
Participants were randomly assigned either to make choices or rate products. They were given a
list of 60 specific varieties of products, such as colored pens, scented candles, popular magazines, and
colored t-shirts. Participants in the no choice condition were asked to read and rate the products on the
extent to which they had used each product in the past (on a scale from 1-5, from never to very often).
Self-Regulation and Choice, p. 11
Participants in the choice condition were asked to read the list of products, but they were also
instructed to choose between two different versions of each product (e.g., between a white t-shirt and a
black t-shirt; a red pen or a purple pen).
Subsequently, participants completed the state version of the Positive and Negative Affectivity
Schedule (PANAS; Watson, Clark, & Tellegen, 1988) and also an 8-item questionnaire that served as
the manipulation check of the methods. Two items asked participants about the extent to which
participants engaged in choice-making during the products task, three items asked about the amount of
consideration, deliberation, and thinking that participants put into the task, one item tapped the extent
to which responses to the product task were of participants’ own choosing, and one final item asked
how tired participants felt. The first seven items were designed to tap into the different aspects of
choice-making that are important in the depletion of self-resources; the last item on tiredness was
included to see if participants reported feeling more tired after making multiple choices. After
completing the product task questionnaire, participants were debriefed and thanked.
Results and Discussion
A factor analysis of the eight items showed that one factor accounted for 43% of the variance in
the unrotated solution (eigenvalue = 3.46), whereas the second factor (eigenvalue = 1.27) accounted
for an additional 16% of variance. Inspection of the varimax-rotated solution showed that 7 items
loaded onto one factor at over .55, whereas item 8 (How tired do you feel?) loaded onto a second factor
(i.e., item 8 loaded at -.001 onto Factor 1 and at .86 on Factor 2). Accordingly, we aggregated the first
7 items into one factor that tapped involvement of self in choosing and left the eighth item on its own to
represent the second factor of feeling tired. Coefficient alpha for the entire scale was satisfactory,
α
=
.75.
A t-test with condition as predictor and the dependent measure of involvement of self (i.e., scale
items 1-7) revealed the predicted effect of condition, t (32) = 2.43, p = .02. Participants in the choice
condition (M = 43.63, SD = 7.09) reported that they were more involved and made more choices
during their task than did participants in the frequency (no choice) condition, (M = 36.06, SD = 10.52).
Self-Regulation and Choice, p. 12
Reports of feeling tired did not, however, vary with condition, t (32) < 1, p = ns (M = 3.31; SD = 2.44
versus M = 3.22, SD = 2.02).
There was a significant difference in the length of time it took each group to complete their
task, t (32) = 3.36, p < .01. The choices task took about a minute longer (M = 210.32 seconds; SD =
65.98) than did the frequency rating task (M = 146.32 seconds; SD = 44.02). Analyses showed,
however, that time spent on the task did not predict scores on Factor 1 (items 1-7) of the involvement
of self measure, r (34) = .10, ns. Furthermore, an ANCOVA with time spent on the product ratings task
as a covariate confirmed that differences in length of time did not account for differences on Factor 1
of the choices measure, F (1, 31) < 1, but rather condition remained a significant predictor in this
model, F (1, 31) = 6.01, p = .02.
As mentioned, participants’ first charge after completing the product ratings task was to
complete the PANAS to determine whether mood differed as a consequence of choosing versus rating
products. A t-test showed that condition did not affect positive affect (PA; M choices = M = 24.31, SD
= 7.09; M frequency = 25.05, SD = 6.61) or negative affect reports (NA; M choices = 13.19, SD = 4.45;
M frequency = 11.89, SD = 2.25), t (32) = .32, ns. Thus, we can rule out differences in mood as a
function of condition.
In sum, the choice procedure led to higher ratings of psychological involvement than the mere
rating task. Participants who made choices among products reported being more self-involved in the
task, relative to participants who rated the frequency with which they had used the products, which
presumably required only conjuring up past instances of use in memory and making a Likert-scale
judgment of usage.
EXPERIMENT 2
Experiment 2 provided the first test of our hypothesis that making choices depletes the self’s
resources. Experiment 1 confirmed that our procedure of having people make a series of binary choices
was perceived by participants as making more demands on the self than the low-choice procedure (of
merely rating the same products). Our theory holds that such effortful, involving choices will deplete
Self-Regulation and Choice, p. 13
the self’s resources, and that this depletion could be seen in impaired performance on a self-regulation
task. Hence in the following three studies (Experiments 2 – 4), the choice (or no choice) manipulation
was followed by a self-regulation task that had no obvious connection with the product-rating task. In
the current study, the choice versus ratings task was followed by the cold pressor task, which has been
deemed a valid measure of self-control (Litt, 1988).
Experiment 2 also included several features that deserve comment. First, the choice
manipulation and the dependent measure were administered by separate experimenters and presented
as separate experiments. We used two different experimenters to ameliorate the possibility that
participants would try to perform well on the self-control task in order to get a better gift from the
experimenter (which was promised as the result of the choice versus rating procedure). Second, the
experimenter for the dependent measure was kept blind to condition, which eliminates the possibility
of unknowingly biasing the results via demand characteristics. Third, the cold pressor task requires
participants to hold their non-dominant hand and most of their lower arm (to the elbow) in frigid water
for as long as possible. We understand self-control as overriding one’s habitual, normal, or natural
response (Baumeister & Heatherton, 1996), and so in this case people had to override their normal
tendency to recoil and pull one’s arm out of the near-freezing water. Thus, we predicted that people
who had made choices among products would not be able to overcome this impulse as well as would
no choice (rating) participants.
Method
Participants
Twenty-five (16 female) undergraduates participated in exchange for partial course credit.
Procedure
Participants were randomly assigned to one of two conditions: a choice task or a no choice task.
In the choice condition, participants made a long series of choices between products, both within and
across categories, much the same as in Experiment 1. For example, 11 colors of t-shirts were displayed
on the table in front of the participants, each labeled with a letter code. Participants made similar
Self-Regulation and Choice, p. 14
choices between items in the following categories: scented candles, t-shirt sizes, shampoo brands,
candy, and types of socks. After choosing preferred items within each product category, participants
then chose between different categories of products. Participants were encouraged to “think carefully
about each choice, because you will be given a free gift at the end of the experiment based in part on
the preferences you indicate here.”
In the no choice condition, participants recorded their thoughts, feelings, and/or opinions about
each of eight advertisements taken from popular magazines. Thus, in both the choice and no choice
conditions, people were asked to rate products, but only in the choice condition were people asked to
make choice decisions. Participants in the no choice condition were also informed that they would be
given the opportunity to select a free gift for themselves at the end of the experiment. They were also
told that the same options were presented to all participants.
Following the manipulation (choice task or no choice task), participants were escorted to
another room, where a second experimenter administered the cold pressor task. This experimenter was
blind to participants’ earlier experimental condition. For the cold pressor task, water temperature was
maintained at 1 degree Celsius (about 34 degrees Fahrenheit) using a mixture of ice and water. An
aquarium pump was used to circulate the water continually to prevent a warm pocket of water from
forming around the participant’s hand. The room air temperature was also maintained at a constant 72
degrees Fahrenheit (22 degrees Celsius). Participants first held their hand and lower arm in room
temperature water for one minute to ensure an equal starting point before putting their arm in the ice
water. Using the standard directions that qualify the cold pressor task as a measure of self-control, the
experimenter asked the participant to put his or her arm into the water up to the elbow and hold it there
for as long as possible. The experimenter used a stopwatch to measure the length of time the
participant held his or her arm in the water. This number (in seconds) served as the measure of self-
control. After completing the cold pressor task, participants were fully debriefed, given an opportunity
to choose a free gift, and thanked.
Self-Regulation and Choice, p. 15
Results and Discussion
Experiment 2 supported the hypothesis that making a series of choices depletes a valuable
resource, leaving the self subsequently less effective at self-regulation. The self-regulation measure in
this study involved holding one’s hand in unpleasantly cold water. Participants who had made a series
of choices quit earlier on the task (by pulling their hands out of the water) relative to participants in the
no choice condition, F (1, 23) = 5.97, p < .025 (see Table 1). The main effect for choice remained
significant when relevant controls were entered into an ANCOVA (trait self-control x gender, with
time taken on the choice vs no choice task as covariate), F (1, 19) = 5.77, p < .03. The resource needed
to enable oneself to persist in holding one’s hand in frigid water was apparently depleted by the
process of making a series of choices.
Persistence on the cold pressor task was not confounded with time spent on the first task. The
product rating task did not take any longer than the choosing task, F (1, 23) = 1.76, ns. Participants in
the no choice condition in fact took slightly more time (M = 26.92 min) than participants in the choice
condition (M = 24.39 min). Thus, the results cannot be explained as due to greater elapsed time, hurry
to leave, or overall tedium in the choice condition. It was not the length of time that people spent on
the task that was depleting. Rather, it was the act of making decisions itself that left people less able to
persist.
The design of Experiment 2 bolstered the findings by ruling out several alternative
explanations. We used two experimenters in the current study, one to administer the dependent
measure and one to administer the product task. Moreover, the experimenter overseeing the dependent
measure was blind to condition, thereby eliminating concern that experimenter demand could have
contributed to the results. Also, no choice participants in the current study were told they would be
able to choose their own gift from a standard set of options, thereby eliminating concern that their
performance on the self-control measure was aimed at persuading the experimenter to offer them a
better gift or a more appealing set of options.
Self-Regulation and Choice, p. 16
EXPERIMENT 3
To provide further evidence of the detrimental impact of making choices on subsequent self-
regulation, Experiment 3 was designed as a conceptual replication of Experiment 2 but with new
procedures for both the choice task manipulation and the dependent measure of self-regulation. Instead
of making choices among small household products, participants in this study made choices (or not, in
the no choice condition) regarding the courses they would take to satisfy their degree requirements.
They were encouraged to take these choices seriously as if they were actually selecting the classes they
were to take in future years, so it seems reasonable to assume that they would regard these choices as
important and relevant to their lives.
Self-regulation was measured in terms of resisting procrastination. Participants were given 15
minutes to study for an upcoming nonverbal (math) intelligence test that was framed as a predictor of
many desirable life outcomes. To practice, participants were given a packet of sample problems.
However, as a competing temptation, they were also allowed to read magazines and play a video game.
We assumed that self-regulation would be required to override the seductive pull of games and
magazines and make oneself practice arithmetic problems. Most likely, this is a self-regulation
dilemma that would be familiar to many college students, namely whether to push oneself to study for
a test or indulge in more pleasant pastimes.
We hypothesized that choosing one’s courses would deplete the self’s resources, as compared
to merely reading about courses and requirements without choosing. We predicted that participants
who made choices would spend more of their time on the time-wasting temptations of magazines and
video game and, correspondingly, would spend less time studying for the upcoming test.
Method
Participants
Twenty-six introductory psychology students (17 males) participated in exchange for partial
course credit. Data from two participants were not included in analyses (leaving 24). One participant
was aware that the intelligence test was not going to be administered and the other was an
Self-Regulation and Choice, p. 17
acquaintance of the experimenter.
Procedure
Participants arrived at the laboratory individually, where they were informed that the
experiment examined whether a person’s choice of college major was related to nonverbal intelligence.
All participants were shown a list of general education course requirements and also a list of all the
classes that satisfy each of these requirements. This information was taken directly from the official
undergraduate bulletin at Case Western Reserve University, which stated that a total of 36 credit hours
(12 courses) in pre-determined content areas are required of all undergraduates regardless of major
area of study. These 12 courses must be selected from a total of over 60 distinct courses offered at the
university.
In the choices condition, participants were directed to spend 8 min indicating which courses
they would choose to take to satisfy each of the general education requirements and to write down their
selections on the response sheet they were given. If they finished this task, participants were to consult
the undergraduate course bulletin to select and then write down the courses they would take to satisfy
their major degree requirements. In the no choices condition, participants were instructed to peruse
course requirements and then read over the different courses that satisfy these requirements. These
participants were also encouraged to review course descriptions of classes in their major and to
consider courses in which they might enroll to satisfy their major degree requirements. These
participants, unlike choice condition participants, were not asked to make formal choices by writing
them down on a response sheet. Rather, they were simply instructed to think about courses in which
they may choose to enroll.
After 8 min had elapsed, the experimenter asked participants to complete the PANAS (Watson
et al., 1988) as a mood questionnaire. Participants then began the nonverbal intelligence (math) test
portion of the experiment. The experimenter explained the format of the test and told participants that
the test is highly predictive of skills important for real-word success. Additionally, participants were
told of past research showing that performing practice math problems for 15 minutes significantly
Self-Regulation and Choice, p. 18
improved performance on the test but practicing for more than 15 minutes did not lead to additional
increases on performance. The experimenter announced he was going to leave the room for 15 minutes
and gave participants a packet of practice math problems. Participants were told they could practice for
the upcoming test for as long as they wanted during the next 15 minutes. The experimenter also noted
that participants could look at magazines or play a hand-held video game (both of which were located
on a stand next to the participants’ work area) if they did not want to work on the practice problems for
the entire 15 minutes. Once participants indicated that they understood the procedure, the experimenter
exited the room.
As the experimenter left the room, a research assistant who was blind to participants’
experimental condition entered an adjacent room and observed participants through a two-way mirror.
The mirror was covered by closed vertical blinds, except for two slats that were slightly bent at an
angle that allowed the observer to clearly view participants’ behavior without their knowledge. The
observer recorded participants’ behavior every 30 sec according to whether the participant was
practicing math problems, looking at a magazine, playing the video game, or engaging in some other
(unscripted) activity such as sitting quietly.
When 12 min 30 sec had elapsed, the experimenter returned and asked participants if they
wanted more time to practice for the intelligence test. All participants declined this offer. Participants
then completed a brief questionnaire that asked how difficult the degree requirement activity (choices
versus no choices task) had been (1 = not at all and 9 = completely), how frustrating the degree
requirement activity had been (1 = not at all and 9 = completely), how much they practiced for the
upcoming nonverbal intelligence test (1 = none and 9 = a lot), and how personally important it was to
do well on the upcoming nonverbal test (1 = not at all and 9 = very much). Finally, participants were
informed that they would not be taking the nonverbal test, after which they were fully debriefed and
thanked.
Results
Our main prediction was that making a series of choices would result in a state of ego
Self-Regulation and Choice, p. 19
depletion, thereby truncating persistence (or practice) at the math problems and leading to more
procrastination. As expected, the choices versus no choices manipulation affected how long
participants practiced for the upcoming test, t (22) = 2.43, p < .05 (see Table 1). After making a series
of choices, participants spent less time practicing for the upcoming IQ test than did participants who
did not make choices. This finding also indicates that depleted participants spent more time playing the
video game, reading the magazines, and doing nothing than did non-depleted participants.
Although our main focus in the current study was on the amount of time spent on the math
problems, we also checked to see whether performance on the math problems differed as a function of
choice condition. We counted every problem participants attempted (because sometimes participants
did a bit of work on a problem but failed to finish it) and subjected this measure to a t-test with choice
condition as a predictor. This measure showed no difference as a function of condition, t (22) < 1, ns.
The number of problems completed also showed no difference as a function of choice condition, t (22)
< 1, p > .60. Number of problems correctly answered also showed no differentiation by condition, t
(22) < 1, p > .80. Last, we conducted an ANCOVA, comparing the choice and no choice conditions on
number of problems correct, with time spent practicing as the covariate. The effect of the covariate,
time spent, was marginal, F (1, 21) = 4.14, p = .06, but the effect of condition on performance was not
significant, F (1, 21) = 0.55, p = .47.
We assessed whether the choices manipulation influenced mood states, which if observed may
have affected persistence. Consistent with the results of Experiment 1, the choice manipulation did not
differentially affect mood. Reports of PA, t (22) = 1.01, p = .33, and NA, t (22) <1. ns, were similar in
the two groups. Further analyses confirmed that choice and no choice conditions did not differ with
regard to self-rated difficulty of their respective degree programs, t (22) = 1.10, ns, frustration with the
tasks, t<1, ns, nor rated importance of performing well on the upcoming intelligence test, t (22) = 1.44,
ns. Thus, the effects of choice were not due to mood, difficulty, frustration, or perceived importance.
Discussion
Experiment 3 conceptually replicated the finding that making a series of
Self-Regulation and Choice, p. 20
decisions leads to subsequent impairment of self-regulation. Participants in this
study were given instructions either to select courses to fill the remainder of their
undergraduate careers or to read and think about course options without having to
choose. Subsequently, participants were given the opportunity to practice for an
upcoming math test said to be predictive of successful life outcomes, but their
studying was compromised by the availability of tempting, fun alternative activities
such as video games and magazines. Participants who had made choices about their
future coursework, as opposed to those who simply read and considered their
options, spent less time studying and practicing for the math test (and spent
correspondingly more time indulging in the tempting distractor tasks). Poor or failed
self-regulation is an important contributor to procrastination (Tice & Baumeister,
1997), and thus Experiment 3 demonstrates another way in which making a
multitude of choices can lead to a breakdown of self-control.
EXPERIMENT 4
One ambiguity about the findings of Experiment 3 was that participants solved the same number
of problems in both conditions, despite the difference in duration of persistence. Although null findings
are generally not entitled to substantive interpretation, one could read those results as indicating that
people who made choices were better at self-regulation (not worse, as we found in Experiment 2), insofar
as they solved approximately the same number of problems in less time. Hence we felt the importance of
conducting a conceptual replication, and we did so in two different ways. Experiment 4 tested persistence
on unsolvable problems and solvable problems after choice or no choice procedures.
To increase the robustness of our conclusions, the choice manipulation was again changed, in this
case to decisions about the psychology course in which participants were currently enrolled. Participants
in the choices condition made a series of decisions about the course, choices they were told (veridically)
would determine the way the instructor taught the course both during the current term and in subsequent
terms. It is possible that participants in Experiment 3 did not see their choices as binding because students
Self-Regulation and Choice, p. 21
can and do change their minds about what courses to take. In contrast, the choices made in Experiment 4
were binding in the sense that once students’ choices were communicated to the instructor via this
experiment, there was no opportunity to change the selections and the instructor was intending to modify
the course on the basis of students’ selections.
Another change made for Experiment 4 was to separate the procedures for the independent and
dependent variables. When the same experimenter administers both the choice manipulation and the self-
regulation measure, it is conceivable that extraneous attitudes toward the experimenter may develop
during the choices manipulation that could confound responses to the dependent measure, as we noted in
connection with Experiment 2. Hence we used the more elaborate procedure of presenting the tasks as
unrelated, including having different experimenters administer the tasks in different rooms.
The main measure of self-regulation in this study was persistence. Persistence requires self-
regulation insofar as the repeated failures are discouraging and frustrating, and the participant would soon
wish to be doing something else — so one has to override the impulse to quit. Because of the possibility
that quitting fast on unsolvable problems signifies exceptionally good self-regulation, however, we ran
two versions of this study, one with unsolvable (4A) and the other with solvable (4B) problems. With the
solvable problems, we were also able to calculate performance quality by counting correct solutions.
Methods
Procedure 4A
Forty-one undergraduates (26 females) participated in exchange for partial course credit. One
participant was unable to complete the study. After arriving and completing consent forms, participants
were told that the first part of the study involved reviewing instructors’ materials from their psychology
class, and the second, unrelated part of the study involved completing a spatial design task. The first
experimenter handed out the materials that contained the choices manipulation. All participants were
given the same materials, but the instructions that accompanied them were different.
Instructions for participants in the choices condition asked them to read the material and, for each
section, to choose which option they preferred. Options were always presented as a two-option forced
Self-Regulation and Choice, p. 22
choice. In one example, participants read descriptions of two possible video clips and chose which film
clip they would prefer to see. Another item involved choosing between two different styles of a test
question, and another item asked them to choose between two paragraphs of text. Participants in the
choices conditions were also told (truthfully) that the choices they made would be reviewed by their
instructor and would affect her decisions for future lectures and tests both during this semester while the
participants were taking her course as well as for future classes. Thus, the choices were presented as
important and consequential. Participants were asked to complete all the choices and return the packet to
the experimenter before moving on to the next part of the experiment.
Participants in the no choices condition were simply instructed to read the same material that was
presented to the participants in the choices condition. They were not asked to make any choices between
the options or to rate the material in any way. They were asked to read the material very carefully and
return the packet to the experimenter before moving on to the next part of the experiment.
Next, participants moved across the hall to complete the persistence part of the experiment with
the second experimenter. The persistence measure involved unsolvable tracing puzzles. This procedure
was developed by Feather (1961), was adapted by Glass and colleagues (1969), and has been used in
several previous studies as a measure of self-regulation. Participants were given a packet containing
several complex figures. Participants were told that performance on these geometric figures was
predictive of future life success, due to its links with higher-order cognitive abilities. They were instructed
to trace each figure in its entirety without once lifting the pencil from the paper or re-tracing any lines.
They were asked to bring their packets back to the experimenter either when they had finished or when
they had worked as long as they could on them and wanted to stop. The experimenter recorded how long
each participant persisted (to the nearest quarter minute). After finishing, participants were given a
manipulation check, debriefed, and thanked.
Procedure 4B
Forty-two undergraduates (28 females) took part in the study. Two participants failed to complete
the study. The procedure for Experiment 4B was the same as for Experiment 4A, with two changes.
Self-Regulation and Choice, p. 23
First, the length of time it took participants to finish the choices or ratings was held constant at 12
min. The choices versus no choices task required going through a lengthy packet. No participant could
complete the choices or ratings task in under than 12 min. After the 12 min had elapsed, participants were
stopped and informed that they would now complete a separate experiment.
The second change was that the dependent measure was persistence on solvable problems. The
second experimenter explained that the next study involved a test of simple mathematical calculations,
which long have been known to predict success in later life. She explained that although most people used
calculators and computers to perform basic arithmetic, this math test was sensitive to brief amounts of
practice and therefore everyone was allowed practice time before taking this test. Participants were
moved into new rooms or carrels and given practice sheets of three-digit multiplication problems, which
they were told to practice for as long as they could, for a maximum of 30 min. When participants felt they
could not practice any longer, they were to return to the first experimental room. At that time, the
experimenter recorded the length of time participants had practiced the math problems (to the nearest
quarter minute). At this time participants were given a questionnaire of manipulation checks, after which
they were debriefed and thanked.
Results
Unsolvable Puzzles (4A)
Participants who did not have to make choices about the material but merely read through it were
able to make themselves persist longer on the tracing task (see Table 1) than were participants who were
asked to make many choices about the same material, F (1, 38) = 7.12, p < .05. Thus, making choices
seems to have depleted some resource, thereby reducing persistence on the second task.
Other analyses confirmed that the manipulation was effective. Participants in the choices
condition were much more likely to report that they were making choices that would affect their own
course than were participants in the no choices condition, F (1, 38) = 585.95, p < .001. There were no
differences on self-reports of ratings of being happy, sad, depressed, or confident (Fs < 1).
Solvable Puzzles (4B)
Self-Regulation and Choice, p. 24
Participants who did not make choices about the course material but merely read it and made
ratings persisted longer on the practice items than did participants who made many choices about the
same material, F (1, 38) = 5.00, p < .05 (see Table 1). Participants who did not have to make choices also
completed more practice problems than participants who were asked to make many choices, F (1, 38) =
6.23, p < .05.
Participants who did not have to make choices got more practice problems correct and marginally
fewer wrong than participants who were asked to make many choices, F (1, 38) = 16.56, p < .001 and F
(1, 38) = 3.81, p = .06, respectively. The difference in number of errors was probably weakened by the
fact that participants in the choice condition spent less time and attempted fewer problems, which should
cause them to make fewer errors than they would otherwise. To correct for this, we computed the error
rate by dividing number of errors by number attempted for each participant. ANOVA on error rates
confirmed that participants in the choices condition made more errors per attempt than participants in the
no choices condition, and this was a significant difference, F (1, 38) = 5.10, p < .05.
Participants in the choices condition were much more likely to believe that they were making
choices that would affect the rest of their semester in the classroom than were participants in the no-
choices condition, F (1, 38) = 224.48, p < .001. Thus, again, the manipulation was successful.
Discussion
In Experiment 4, some participants made choices pertaining to their psychology course, whereas
other participants examined the same materials but did not make choices. Those who made choices
subsequently gave up faster on unsolvable (Experiment 4A) and solvable (Experiment 4B) items, as
compared to participants who did not make choices. These findings provide further evidence that making
decisions can deplete an important self-regulatory resource, thereby making it more difficult for the
person to resist the temptation to quit while performing a wearisome task. In Experiment 4B, making
choices about one’s psychology course caused people to quit faster and get fewer right while practicing
multiplication problems for an upcoming test. Making choices also caused people to make marginally
more errors despite spending less time on the problems.
Self-Regulation and Choice, p. 25
Several design features facilitate interpretation of findings. The choices in Experiment 4 were
real and consequential, in the sense that they did influence how the instructor set up the remainder of
the course (as opposed, possibly, to what participants thought in Experiment 3). Using two
experimenters (one blind) ruled out any likelihood that demand characteristics or desire to impress the
(first) experimenter influenced the results. The amount of time spent on the first task was the same for
all participants in Experiment 4B, ensuring that persistence on the second task was not affected by how
much time had been spent on the first. It was also apparent that less persistence meant poorer
performance: Participants who made choices got fewer correct (unlike in Experiment 3) and made
more errors than those who did not make choices.
In sum, it appears that making choices depleted some resource that was then unavailable to
facilitate performance on unsolvable and solvable tasks. Self-regulation is useful for making oneself
persist on a difficult task, for overseeing the calculation process, and for checking and correcting
errors, all of which are weakened by previous efforts involved in making choices.
EXPERIMENT 5
To provide a final test of our hypothesis of decision fatigue, Experiment 5 moved outside the
laboratory. We approached customers at a shopping mall and assessed the number of decisions they
had made during their shopping trip thus far. To measure self-regulation, we then asked them to
perform easy but tedious arithmetic problems (adding 3-digit numbers). This task requires self-
regulation because most shoppers would probably rather do something else than perform arithmetic,
and so the impulse to quit must be overridden if they are to continue. We predicted that shoppers
whose resources were depleted by having made a greater number of prior choices would quit faster on
the arithmetic problems.
A conceptual replication of the laboratory findings from Experiments 2-4 was desirable for
several reasons. First, this study drew its participants from a non-university sample, which increases
confidence in the generalizability of the results. Second, this study avoided a potential confound of
differential time spent on different experimental tasks (and shoppers would also furnish estimates of
Self-Regulation and Choice, p. 26
how long they had been shopping, which later could be controlled for when analyzing the impact of
prior choices). Third, participation in this study was not affected by a desire to earn a reward, because
no reward or gift was offered.
Having shoppers perform math problems also enabled us to check the accuracy of their work.
Competing predictions could be made, based on previous findings indicating that ego depletion impairs
intellectual performance on complex tasks that require executive control, but it does not affect simple
tasks such as rote memory (Schmeichel et al., 2003). On the one hand, addition problems involve
applying rote memory (for sums) and following pre-established rules. Insofar as such simple tasks do
not require active regulation by the executive self, they should not be impaired by resource depletion.
On the other hand, self-regulation could be useful in overseeing the process, such as checking for
possible errors and ensuring that rules are followed properly, and depletion might therefore lead to
poorer performance.
Method
Participants
Fifty-eight shoppers at an open-air shopping mall in Salt Lake City, Utah participated. They
were approached by members of the research team and asked for their time in a volunteer (i.e., no
remuneration) experiment. Ninety-six people were approached and 19 women and 39 men agreed to
participate (60% response rate). The age of participants ranged from 18 to 59, with 91% of participants
listing their ethnicity as White (non-Latino), 4% listing Asian, and 5% listing Latino.
Procedure
Participants were approached by a research assistant in the outdoor corridors of a shopping mall
and asked if they would be able to participate in an experiment. Research assistants were instructed not
to reveal much about the experiment before participants agreed or declined to participate, so that the
details of the task (described next) did not influence who chose to participate. Participants were told
the experiment involved answering some questions about their shopping trip and then engaging in a
cognitive task.
Self-Regulation and Choice, p. 27
After a brief demographic questionnaire, participants completed a written version of the
psychological involvement in choices scale that was used in Experiment 1 (except two redundant items
asking about the degree of which choices were required during the task were combined). Participants
were asked to respond to questions by thinking about their behaviors during the course of the day, and
to give a numeric rating of 1 (not at all) to 10 (very much so) for the following items: How many
choices did you feel you have made on your shopping trip today? How personally important were the
choices you made shopping today? How much careful consideration did you put into choices you have
made today? How much did you deliberate before making each choice today? How much did you think
about your options prior to making each choice today? How active did you feel in making your choices
today? How tired do you feel right now? Participants were also asked to list their time spent shopping
in hours and minutes. Shopping times ranged from 1 minute (for participants who had just begun
shopping) to 4.5 hours.
Subsequently participants were presented with 64 three-digit plus three-digit addition problems
printed across two sheets of paper. They were asked to do as many as they could, with the
understanding that they could stop anytime they “quit, finished, or decided to give up.” These
instructions come from past depletion research (Vohs & Heatherton, 2000) in which self-control was
measured as persistence on a cognitive task. Unbeknownst to participants, there was a second research
assistant standing approximately five feet away who surreptitiously recorded the amount of time that
participants spent on the addition problems. She started recording when the participant turned the page
to begin the math problems and stopped recording when the participant stopped completing the
problems. Afterwards, participants were debriefed and thanked for their cooperation.
Results
Choices Scale
First, we conducted a factor analysis on the seven items from the choice scale to test whether
they revealed patterns similar to that seen in Experiment 1. The data were subjected to a varimax
rotation, and a two-factor structure emerged. Factor 1 accounted for 39% of the variance observed and
Self-Regulation and Choice, p. 28
Factor 2 accounted for an additional 27%. The items loaded onto factors similarly as in Experiment 1.
That is, scale items asking about number of choices, importance of the choices, degree of
consideration, deliberation, and thought put into the choices, and degree of activity involved in making
those choices all loaded onto the first factor at > .36. In contrast, the item asking about tiredness loaded
weakly and negatively onto Factor 1 (-.17), but strongly and positively on Factor 2 (.71). Therefore, we
aggregated the first six items into one factor and referred to them (similar to Experiment 1) as
psychological involvement of the self and left the item tapping respondents’ tiredness on its own. We
used these factors as predictors in the subsequent analyses.
Persistence on the Math Problems
Participants’ persistence on the math problems was the primary indication of good self-control.
Persistence was operationalized both in terms of number of problems completed and amount of time
spent on the math problems. Using the psychological involvement factor (items 1-6 from the choices
scale), the tiredness item, and shopping duration as predictors, we ran two regression models to predict
time spent on the math problems and number of problems completed (which were highly correlated, r
(58) = .71). The overall models were significant, F (3, 52) = 3.71, p < .02 for math time, and F (3, 52)
= 4.77, p < .01, for number of problems completed. Moreover, we found the expected (negative) effect
of psychological involvement in predicting number of problems completed,
β
= -.44, t (52) = 3.43, p <
.01, and math time,
β
= -.31, t (52) = 2.38, p < .02. In other words, the more that people had made
frequent and deliberate choices, the less able they were to persist on our math task (see Table 1). In
these models, participants’ tiredness was not a significant factor in number of problems completed,
β
=
.07, t (52) = .51, ns, or for time spent on the math problems,
β
= .20, t (52) = 1.53, p >.13. Shopping
duration was also not a significant predictor for either measure, ts (52) < 1, ns. Thus, we found support
from outside the laboratory for the hypothesis that extensive decision-making impairs subsequent self-
regulation.
In a second set of models we sought to test the robustness of the choices effect in models where
other possible predictors would vie for variance. In these subsidiary models, we included the three
Self-Regulation and Choice, p. 29
predictors as before (time spent shopping, tiredness, and psychological involvement in choices), as
well as ethnicity, age, and gender in order to predict time spent on the math problems and number of
problems completed. The overall models were significant, F (6, 49) = 3.99, p < .01, for number
completed and F (6, 49) = 2.64, p < .03, for math time. More notably, the predicted effect of
psychological involvement in making choices remained significant despite the additional controls,
showing no decrease (and in fact a slight increase in strength) from the previous three-predictor
models,
β
= -.48, t (49) = 3.72, p = .001, for number of problems completed, and
β
= -.35, t (49) =
2.65, p < .02, for time spent on the math problems.
Self-reported tiredness was not a significant predictor of persistence at math problems, t (49) <
1, ns, for number of problems completed, and t (49) = 1.09, p > .28, for time spent on the problems.
Time spent shopping and age likewise failed to yield a significant effect on either measure of
persistence, all ts (49) < 1.01, ns. Gender showed a trend toward predicting number of math problems
completed, t (49) = 1.61, p = .11, with men completing more problems than women, but gender did not
predict time spent on the math problems, t (49) = 1.15, p > .25. Last, ethnicity predicted both measures,
t (49) = 2.42, p < .02, and t (49) = 1.90, p = .06.
Number of problems correct
As an ancillary test of our hypothesis that making choices leaves people in a state of potential
regulatory failure, we computed the number of problems correctly completed as a measure of self-
control ability. As mentioned, past research has shown that one consequence of self-regulatory
resource depletion is a reduction in cognitive abilities and consequently poorer intellectual
performance (Schmeichel et al., 2003). Accordingly, we examined whether participants who had made
more choices would perform more poorly on the computation involved in the three-digit plus three-
digit math task.
Using the more sophisticated model that included the psychological involvement factor,
tiredness, time spent shopping, age, gender, and ethnicity as predictors, we found that, similar to the
other measures of self-regulation in this study, number of problems completed correctly was also
Self-Regulation and Choice, p. 30
predicted by the psychological involvement factor,
β
= -.51, t (49) = 4.12, p < .01. In this model, again,
the predictive contributions of tiredness, time spent shopping, gender and age were all nonsignificant,
ts < 1.4, ps >.17, whereas ethnicity was a significant predictor, t (49) = 2.67, p = .01.
Discussion
Experiment 5 provided converging support for the hypothesis that choice-making interferes
with subsequent self-regulation. Shoppers at a local mall reported how much psychological
involvement they had put into making shopping decisions that day and then were asked to solve
arithmetic problems. Self-regulation was measured by persistence on math problems. We found that
the more choices the shoppers had made, the more quickly they gave up on the math problems, as
measured by both time spent and number of problems attempted. Moreover, the negative impact of
prior decisions on math persistence remained significant even after controlling for how long they had
been shopping, how tired they were, and for several demographic categories including gender, age,
race, and ethnicity.
Making more shopping choices was also associated with poorer performance on the math test,
measured in terms of number of problems solved correctly. The correlational design of this field study,
however, renders it less supportive of causal conclusions than the previous laboratory experiments.
The temporal sequence rules out the possibility that math persistence caused the (prior) shopping
decision-making, but third variable explanations are still plausible, such as that people who enjoy
making effortful decisions while shopping simultaneously dislike expending effort on math problems.
(That said, on an a priori basis one would likely predict the opposite, such that people with high need
for cognition would put more thought into both shopping decisions and math problems.) In that
respect, these findings are less conclusive than those of the prior studies, but they also add valuable
convergence. The decisions in this study were not mandated by the experimenter but instead were
naturally occurring decisions made by people in the course of their daily lives. The sample was also
much more diverse (e.g., in age, education, and income) than the university populations sampled in the
preceding studies. Also, as noted in the Introduction to this study, some of the potential confounds of
Self-Regulation and Choice, p. 31
the laboratory studies were ruled out by the design of this investigation.
In sum, we think that the convergence across multiple studies with different procedures and
measures is more convincing than the results of any single study. The experiments reported thus far
have consistently found that effortful decision-making leads to subsequent decrements in self-
regulation. This pattern was found in laboratory, classroom, and shopping mall. This pattern was found
with assigned choices and spontaneously made choices. This pattern was found with inconsequential
and more consequential choices. And this pattern was found using a variety of self-regulation
measures. We therefore turned to testing our second hypothesis, which is the idea that resource
depletion can also occur as a result of performing actions that one did not choose for oneself.
EXPERIMENT 6
The next two experiments tested the idea that choice-making can be beneficial to the self-
regulatory system, insofar as carrying out a course of action that has been chosen by oneself, rather
than by someone else, is psychologically less taxing. That is, it should be easier to perform actions of
one’s own choosing as opposed to carrying out actions that someone else chose for you.
The following experiments tested this idea by varying or measuring the degree to which
participants chose a behavior that they would later have to execute: Some participants had a choice
over the goal they were to attempt to achieve, whereas others had less of a say. After performing goal-
directed behaviors, we asked participants to perform a second task that served as a measure of self-
regulation. Differences in the second, regulatory task as a function of degree of choice regarding the
first task suggest that the operations of the first task taxed the regulatory system to varying degrees in
accordance with perceptions of choice over whether to perform it. Put more plainly, we expected that
when participants were allowed to choose the task that they would later be performing, as opposed to
having it chosen for them, the ensuing behaviors aimed at completing that task would be less
psychologically depleting, thereby allowing for better self-control subsequently.
Experiment 6 tested the hypothesis by borrowing a paradigm from the dissonance literature. In
the current study, participants in the high choice condition were reminded of their decision freedom
Self-Regulation and Choice, p. 32
regarding their participation in an upcoming task, which leads to the well-known effect of making
behavior appear to be a reflection of one’s own choosing and to be something for which one is
responsible (e.g., Linder et al., 1967). Participants in the low choice condition were simply given a task
to perform. Before and then after the numeric task that served as the context for manipulating
perceptions of choice, participants squeezed a handgrip as a measure of self-control. Prior research has
demonstrated that the ability to hold the handgrip steady is not merely an indicator of physical strength
but also depends on self-regulation (Rethlingshafer, 1942). We predicted that participants who
performed the numeric task under high choice would demonstrate better self-regulation subsequently
than would participants who were instead directed to perform the same task.
Method
Participants
Participants were 16 female and 13 male undergraduates who participated in exchange for
partial course credit.
Procedure
Participants came to the lab individually and were met by an experimenter who informed them
that the current experiment would involve some exploratory measures as well as some cognitive tasks.
Participants were told, “the first thing you are going to do is help us with a measure we are pilot testing
for future experiments. We are interested in getting measurements of physical strength in people of
college-age. I would like you to grip this handgrip as long as you can as part of this pilot testing.” The
experimenter then started a stopwatch at the same time that participants squeezed the handgrip
strengthener, which is an exercise device used by bodybuilders and others to increase handgrip force.
The handgrip device consists of two handles and a spring that forces the two handles apart. One’s goal
when gripping the exerciser is to squeeze the handles together for as long as possible. For the purposes
of this experiment, a piece of paper was inserted into the handgrip exerciser to measure the point at
which participants stopped holding together the two handles: once the paper dropped out from the
middle of the device, the experimenter stopped the stopwatch to signal that the participant’s grip had
Self-Regulation and Choice, p. 33
gone slack. This procedure has been used in past studies of self-regulatory resources (e.g., Muraven et
al., 1998;Vohs et al., in press). This first measure provided the baseline against which to compare later
handgrip performance as a test for possible change in self-regulation.
Next, participants were presented with the manipulation of high versus low choice, which
pertained to a numeric puzzle. Participants in the low choice condition were told that different
participants did different tasks at this point in the experiment, and that by random assignment they
were assigned to the numeric puzzle task. Their job would be to locate each of 33 target strings in the
grid of numbers above. Participants in the high choice condition were given similar instructions, except
that after they were shown the puzzle and given their charge, they were told, “…the rules of the
experimental procedures at this university are such that participants may opt to stop the experiment or
not to do any tasks that they do not want to do.” The experimenter then directly asked the participant,
“Are you sure you want to do this? You don’t have to do it if you don’t want.” Consistent with other
studies on dissonance, all participants in the high choice condition agreed to continue with the task.
Because low choice condition participants were simply told that they had been assigned to the numeric
puzzle task, these participants were not reminded of their ability to choose whether to perform the task.
The numeric task that all participants were given was similar to ‘search-a-word’ puzzles that
are common in children’s books. In the current version, however, participants were required to find
specific strings of numbers in a larger block of numbers. The fact that this puzzle uses numbers instead
of letters makes it particularly difficult (because letters form recognizable words, whereas specific
number sequences are much harder to detect); additionally, the grid of numbers in which participants
were to find the target number strings was quite large, measuring 25 x 16, thus totaling 400 numbers.
Participants in both conditions were told that they would be performing a cognitive task and
that their goal was to find each of 33 target strings of numbers (which ranged from three-digit numbers
to 10-digit numbers) within the larger grid of 400 numbers. We created the puzzle such that six of the
33 target strings were solvable but the remainder were unsolvable. The solvable items were included to
minimize suspicion that the task was impossible.
Self-Regulation and Choice, p. 34
Participants then were left to complete the numeric puzzle for 4 min. Participants then
completed a version of the Intrinsic Motivation Scale (IM; Ryan, 1982) that contained subscales
tapping choice, effort, enjoyment, and value, which were chosen for their relevance to the goals of the
current study. Participants also completed the PANAS (Watson et al., 1988).
The next task involved gathering a second measure of handgrip control to see whether the
choice manipulation affected self-control. Participants once again squeezed the handgrip exerciser for
as long as they could. They were told that the second measurement was needed because multiple
assessments provide the most accurate measure. After the second handgrip, participants completed a
post-experimental questionnaire. Then participants were debriefed and thanked.
Results
Manipulation Check
Participants’ reports on the choice subscale of the IM formed the manipulation check of choice
condition. Ratings on this subscale confirmed that participants in the high choice condition felt they
had chosen to engage in the task more than participants in the low choice condition, t (27) = 2.74, p <
.02 (M low choice = 37.56, SD = 10.39; M high choice = 45.92, SD = 3.88).
Handgrip Performance
The main prediction was that performing the number search task under low (rather than high)
choice would deplete the self’s resources as indicated by decrements in handgrip performance. To test
this, we computed a regression model with two steps. With Handgrip 2 (post-manipulation) as the
predicted variable, we first entered gender and Handgrip 1 (pre-manipulation) as predictors in Step 1;
next, we entered in the choice condition variable as Step 2. The model revealed that gender and
Handgrip 1 had significant effects, and the predicted effect of choice condition was also a significant
factor: choice condition,
β
=
.23, t (28) = 2.34, p < .03; gender:
β
= -.34 (such that men had more
handgrip ability than women), t (28) = 2.85, p < .01; Handgrip 1:
β
= .63, t (28) = 5.34, p < .001
(indicating that those who held on longer the first time also held on longer the second time).
Although all participants showed a decrement in handgrip ability from Assessment 1 (pre-
Self-Regulation and Choice, p. 35
manipulation) to Assessment 2 (post-manipulation), participants who felt that they freely chose to
perform the numeric search task showed smaller decrements (M decrement = -.11.69, SD = 31.50;
Assessment 1 M = 70.23, SD = 62.85; Assessment 2 M = 58.54 SD = 46.33) than participants who had
little choice in whether to perform the numeric task (M decrement = -.31.50, SD = 31.37; Assessment 1
M = 80.63, SD = 45.09; Assessment 2 M = 49.13 SD = 32.99).
Intrinsic Motivation
Participants completed four subscales from the Intrinsic Motivation Scale (Ryan, 1982). The
analyses on the perceived choice subscale were presented earlier as a manipulation check. Subscales
pertaining to value/usefulness, interest/enjoyment, and effort/importance were included to investigate
whether perceptions of the task on these dimensions was influenced by high or low choice conditions.
Three t-tests using choice condition as a predictor revealed that only the value subscale was affected, t
(27) = 2.01, p < .055, M low choice = 22.69, SD = 10.03; M high choice = 29.54, SD = 7.89.
Participants in the high choice condition agreed more with statements such as, “I believe doing this
activity could be beneficial to me,” and “I would be willing to do this again because it has some value
to me.” Ancillary analyses showed no mediation on the part of value scores in predicting self-control
(handgrip performance) from choice condition. Results of the t-tests on effort and enjoyment showed
no differences as a function of condition, ts (27) < 1, ns. Thus, being in the high choice condition led
participants to perceive the numeric task as more valuable — in addition to affecting perceived choice
— but it did not bring about changes in effort or enjoyment of the task.
Mood and Difficulty
We next checked to see that positive and negative affect (as measured by the PANAS) also
showed no difference as a function of choice condition. As in previous studies, mood did not vary as a
function of condition ts < 1.1, ps > .30. Hence, participants’ perception that the numeric task was more
chosen by them than for them had no significant effect on their affective states.
Post-experimental questions asked participants to rate the difficulty of the numeric puzzle task
and both handgrip measures. Ratings on these measures did not differ by choice condition, all ts < 1, ps
Self-Regulation and Choice, p. 36
>.35. Thus, participants did not experience the numeric puzzle task as more or less difficult because of
having greater or lesser control over participating in it, nor did they perceive any differences as a
function of condition in the difficulty of the handgrip tasks.
Discussion
Experiment 6 turned from examining the costs to the benefits of choice. Whereas Experiments
2-5 showed that making choices led to subsequent decrements in self-regulation, Experiment 6 found
that self-regulation could be improved among people who had made a prior choice. In this study,
participants all performed an unpleasant and difficult initial task, either by their own choice or by
being assigned to it. (In actuality, all participants were assigned the same task but some were induced
to feel as if the choice had been theirs.) Making oneself perform the difficult task appears to have
depleted regulatory resources for all participants, as indicated by poorer performance on a physical
stamina (handgrip) task. But the decline in stamina was mitigated among people who felt they had
freely chosen to perform the difficult initial task. Apparently, aversive tasks are most depleting when
one does not feel one has had any choice about whether to do them. Perceived choice makes the bad
task less depleting.
Participants in the high choice condition rated the difficult task as more valuable and more
personally beneficial than participants in the no choice condition, but these benefits of choice were
unrelated to the depletion effect, according to our mediation analyses. We also found no difference in
rated enjoyment of the task, nor in subjective perceptions of effort expended on the task. Thus, the
depleting effect of performing a difficult, unchosen task does not seem to be mediated by the
subjective experience of performing the task. Instead, the self apparently expends more of its resources
in making itself perform an unchosen task than in making itself perform a task it has chosen.
EXPERIMENT 7
Experiment 7 approached the question of freedom of choice and self-regulation from another
angle. The independent variable of choice involved students preparing to take one of the standardized
examinations generally required of applicants to graduate, law, medical, and business schools. We
Self-Regulation and Choice, p. 37
assumed that some students are internally motivated by their own goals and ambitions to take those
examinations, whereas others take them under pressure from parents, partners, professors, or other
external sources. If choice does indeed make onerous tasks less depleting, then taking such an exam
should consume fewer resources if students regard the it as reflecting their own choice rather than
someone else’s. As a consequence, these students should be more successful at a second task requiring
self-regulation, relative to students who feel externally pressured to take the exam.
Hence Experiment 7 (like Experiment 5, but unlike the other studies in this report) relied on
measuring actual personal choice instead of manipulating it. As we have said, there are interpretive
questions that attend either measured or manipulated choice, and so we have looked for convergence of
results to make our case.
The quest for multimethod convergence also led to a new dependent measure of self-regulation
for Experiment 7. Participants performed a task that involved a speed-accuracy trade-off. Participants
were asked to play a commercially-available game called Operation that is won by moving one’s hand
slowly and carefully across the board so as not to make mistakes. In the present study, the participants’
goal was to make as few errors as possible while completing the task in the shortest possible length of
time. Some of the more challenging control tasks that humans perform (e.g., shooting a moving
animal, hitting a fastball, buying a stock at the best price) rely on the ability to achieve the right
balance between speed and accuracy. Measures of speed-accuracy tradeoff have also been used in past
studies of self-regulatory resource depletion (e.g., Schmeichel et al. 2003). In the current study, the
combination of number of errors and the length of time it took to complete the game was the dependent
measure.
We predicted that students who worked on sample items from graduate examination tests
would be depleted afterwards, and consequently would perform poorly on the speed-accuracy trade-off
task — but only if they perceived themselves to have low choice about taking the actual standardized
test. In contrast, the sense of having chosen the graduate examination themselves would make doing
practice problems less depleting, and so better subsequent self-regulation would be reflected in better
Self-Regulation and Choice, p. 38
performance on the speed-accuracy tradeoff task.
Method
Participants
Participants were 37 undergraduate students (22 male, 14 female, and 1 unknown) who
participated in exchange for $5. One participant’s data were not analyzed because of failure to
complete the study. On the measure of speed and the combined speed-accuracy measure, another
participant’s data were not analyzed due to scores over 4 standard deviations above the mean.
Procedure
Participants were recruited for the experiment by advertisements aimed at students who were
intending to take any one of the standardized tests for entrance to graduate or professional school.
These tests are the Graduate Record Examination (GRE), the Medical College Admission Test
(MCAT), Graduate Management Admission Test (GMAT), and the Law School Admission Test
(LSAT). Participants came to the lab individually. An experimenter told them the experiment involved
performing several different types of cognitive tasks. First, participants completed the perceived
choice, value/usefulness, interest/enjoyment, effort/importance subscales of the IM Scale (Ryan,
1982), which was modified to refer to the graduate exam that the participant was intending to take. The
instructions read (underlined parts denote words added for the purposes of the current study, but were
not emphasized in participants’ instructions), “For each of the following statements, please indicate
how true it is for you with regard to the standardized test you are taking, using the following scale.
Think about studying for and taking the exam while answering the questions.” The only other
modification to the IM Scale was changing the phrases “this activity” or “this task” in each sentence to
“the test.” A sample sentence is, “I believe I have some choice about taking the test.”
Next participants were given a packet that contained 16 questions taken from various practice
methods for standardized tests. We included items from all four types of tests that students would be
taking (MCAT, LSAT, GMAT, and GRE) as well as some items from the Miller Analogies Test, a test
that is no longer commonly used. There was one item for each to test logical reasoning, analytical
Self-Regulation and Choice, p. 39
reasoning, quantitative comparisons, data sufficiency, critical reasoning, sentence completion, and one
antonym. Additionally, there were two algebraic items, two reading comprehension items, and four
analogies. We included a variety of question types to guard against the possibility that participants who
were studying for certain tests (e.g., the GRE) would be more familiar with certain types of items. The
experimenter instructed them to complete as many items as possible, while also trying to get as many
correct as possible. They were told that the experimenter would stop them in 15 minutes or that they
could ring a bell if they finished sooner. The experimenter timed how long participants took to
complete the sample items and stopped them if they reached the ceiling of 15 minutes.
Following the test questions, participants completed the PANAS (Watson et al., 1988). Next,
the experimenter brought in the game Operation, a commercial board game targeted at children that
involves taking fake plastic body parts (e.g., liver, spleen, heart) from a cartoon patient using pincers.
The game is one of accuracy, because the body parts sit in a shallow pit that is surrounded on all sides
by metal edges that buzz loudly if the metal pincers touch them. Thus, one’s goal is to take the body
part out carefully so as not to set off the annoying buzz. Participants were shown the game and shown
how to remove the body parts and then told that their goal was to remove all the body parts without
touching the sides of the compartments (which would then emit a buzz) while also going as quickly as
they can. Participants were allowed one practice trial each and then the game began. The experimenter
stood behind and to the side of the participant for observation. She recorded the number of buzzes,
which formed the measure of inaccuracy in this study. The length of time it took each participant to get
all the pieces out was recorded as a measure of speed. After the Operation game was complete,
participants completed a post-experimental questionnaire. Then they were debriefed and thanked.
Results
Preliminary results
We first computed scores on the choice, value, enjoyment, and importance subscales of the
Intrinsic Motivation Scale (Ryan, 1982) 1 and then centered them for entry into the regression models.
Next we used the four subscales on the IM scale to test whether participants differed in terms of their
Self-Regulation and Choice, p. 40
perceptions of the difficulty of the sample test questions or the difficulty of the Operation game, as
measured by a post-experimental questionnaire. Our analytical strategy for this measure and
subsequent measures was as follows: we used all four Intrinsic Motivation subscales as simultaneous
predictors (along with gender) to test for significant effects of perceived choice. We included all four
subscales to ensure that any potential effects of perceived choice were above and beyond effects of
other aspects of intrinsic motivation.
Speed-Accuracy Results
The main purpose of this experiment was to test the hypothesis that higher perceived choice on
the graduate admission test would lead to better performance on the speed-accuracy (Operation) task.
Number of errors (buzzes) and amount of time it took to complete the game served as measures of
accuracy and speed, respectively. We first standardized speed and accuracy measures and then, as a
method of combining the two measures into one index of the speed-accuracy tradeoff, we added the
two z-scores together. Lower numbers on this measure indicate fewer errors and faster completion of
the Operation task (i.e., overall better performance). In the analyses that follow, we used gender and
the four subscales of the IM scale (centered) to predict the combined speed-accuracy measure.
The results of this analysis supported our prediction that perceived choice would determine
performance on a speed-accuracy trade-off task,
β
= -.54, t (28) = 3.26, p < .01. The direction of the
beta weight signals that high scores on the perceived choice measure (i.e., feeling that the upcoming
graduate/professional exam is freely chosen) were related to better performance (i.e., fewer errors and
faster completion) during the Operation game, which was played after participants completed a task
directly related to the upcoming test (see predicted values in Figure 1). All other ts < 1.61, ps > .12.
A breakdown of the two constituents of this measure showed that perceived choice was a
significant predictor of errors committed,
β
= -.53, t (28) = 2.93, p < .01, and of time spent on the task,
β
= -.45, t (28) = 2.53, p < .02. No other variable was significant in predicting these two components,
ts < 1, except gender marginally predicted time spent on the task,
β
= .28, t (28) = 1.88 p = .07, such
that women took longer than men. Another method of assessing whether there was a speed-accuracy
Self-Regulation and Choice, p. 41
trade-off in performance on the Operation game is to compute the correlation between speed and errors
(see Patterson, Kosson, & Newman, 1987). A speed-accuracy tradeoff would be suggested by an
inverse association, which is the opposite of what measures in the current study showed, r (34) = .66, p
< .01.
Analyses on Sample Test Items
We conducted subsidiary analyses to see if perceived choice affected performance on the
sample standardized test questions. A regression model with the four IM scores and gender revealed
that number of questions answered correctly was also predicted by the choice measure,
β
= .39, t (28)
= 2.50, p < .02, as well as by value scores,
β
= .43, t (28) = 2.25, p < .04, such that greater feelings of
choice and higher value scores related to more correct answers. Additionally, number of problems
attempted was predicted by perceived choice,
β
= .35, t (28) = 1.99, p = .056, such that higher feelings
of choice related to more problems attempted. Value scores,
β
= .39, t (28) = 1.81, p = .08, were also
marginally predictive. All other effects of gender, interest scores, and enjoyment scores were
nonsignificant, ts < 1.2 ps >.23.
In sum, participants who viewed a forthcoming standardized exam as a task they freely chose
were shown to be faster at completing sample test items than participants who felt obliged to take the
forthcoming exam. Moreover, these participants who felt they chose the direction of their test-taking
future also managed to commit fewer errors on the sample questions than did their low-choice
counterparts, thereby better succeeding at their goals. Despite this, they still performed better than their
counterparts with lower perceived choice scores by making fewer errors in less overall time on the
speed-accuracy trade-off game.
Tests of Mood Effects
Participants completed the PANAS (Watson et al., 1988) as a measure of temporary affect after
attempting the sample test questions. A regression with the predictors of perceived choice, value,
enjoyment, and importance from the IM Scale was computed to predict both positive and negative
affect scores. The results of this model showed that perceived choice was not a predictor of positive
Self-Regulation and Choice, p. 42
affect,
β
= .29, t (28) = 1.53, p = .14, nor of negative affect,
β
= -.06, t (28) < 1, p > .77.
Supplementary Analyses
Perceived choice was not predictive of difficulty ratings in regard to sample standardized test
items,
β
= -.01, t (29) < 1, p > .98, nor were the value subscale, importance subscale, enjoyment
subscale, or gender, ts < 1.70, ps > .10. Ratings of the difficulty of the game were not predicted by the
choice subscale,
β
= .09, t (29) < 1, p > .67, but were predicted by value subscores,
β
= .72, t (29) =
2.86, p < .01, and by importance subscores,
β
= -.56, t(29) = 2.22, p < .03, but not gender or enjoyment
subscores, ts (29) < 1.45, ps > .16. In sum, the variable of interest —!perceived choice — did not relate
to perceptions of difficulty of the sample standardized test items or of the Operation game.
As mentioned, participants were allowed to spend up to 15 minutes on the sample test
questions. The length of time it took participants to complete the items was recorded and then used as
the criterion variable in a regression with these following five predictors: the four subscales of the IM
(choice, value, enjoyment, and importance) and gender. A regression predicting time spent completing
the test questions showed that perceived choice did not relate to time, t (29) = 1.46, p > .16.
Descriptively, 83% of participants (30 of 35) went to the limit of 15 minutes, and of those who did not,
four participants took over 14 minutes
Discussion
Experiment 7 showed that participants who would be taking an upcoming graduate/professional
school examination test performed a speed-accuracy tradeoff task better if they felt they were taking
the graduate test by their own choosing. As an intermediary step in this experiment, participants
answered questions that closely approximated those they would be completing in their forthcoming
exam, a task that served to activate the influence of perceived choice on regulated behavior.
Apparently, working on those sample items was challenging and depleted the self’s resources, but the
depletion (as indicated by performance on the subsequent Operation game) was less among people
who felt the graduate exam corresponded to their own choice. Put another way, doing sample items for
a test that was not perceived as one’s own choice was especially detrimental to one’s subsequent self-
Self-Regulation and Choice, p. 43
regulation, as compared to those who perceived the test as their own choice.
How did participants with higher choice scores achieve better performance on the second
regulated task? It was not by lackadaisically muddling through the earlier (test taking) task. On the
contrary, the participants whose test-taking reflected their own choices (instead of someone else’s)
worked harder on the practice test, as indicated by attempting and solving more problems. One might
have expected them to be more tired and hence to perform worse on the Operation task, but instead
they did better. The implication is that forcing oneself to work on tasks that are not of one’s own
choosing requires some degree of effortful self-regulation, whereas working on self-chosen tasks is
less depleting.
GENERAL DISCUSSION
Ambivalence about choice presents one of the great seeming paradoxes of modern life. On the
one hand, the desire for choice seems ubiquitous. People clamor for freedom in their private and
political lives. In the economic marketplace, consumers reward companies that provide them with ever
more fine-grained choices. In psychological data, people exhibit patterns such as reactance (Brehm,
1966) and illusions of control (Langer, 1975) that indicate deeply rooted motives to maintain a feeling
of having choices. On the other hand, people tire of the endless demands for choice and the stress of
decision-making. In psychological research, there are signs that having too much choice can be
detrimental to satisfaction and that people resist having to face up to the tradeoffs that many choices
involve (Iyengar & Lepper, 2000; Luce, Bettman, & Payne, 1997; Schwartz, 2001; 2004).
The present investigation sought to shed light on both the costs and benefits of choice. Both
costs and benefits can be seen in terms of the impact on subsequent self-regulation. Making choices
can be difficult and effortful, and there is an intrapsychic cost to choosing that is seen in decrements in
subsequent self-regulation. But having to perform tasks chosen by others also carries an intrapsychic
cost that likewise can impair subsequent self-regulation.
The costs of decision-making were the focus of Experiments 1-5. These were based on the
hypothesis that deliberate, effortful choice consumes a limited resource needed for a broad range of
Self-Regulation and Choice, p. 44
executive functions, including self-regulation. Participants made a series of choices about consumer
products, college courses, or course materials — or, in the no-choice conditions they studied and rated
those materials without choosing among them. Making choices apparently depleted a precious self-
resource, because subsequent self-regulation was poorer among those who had made choices than
among those who had not.
Having five experiments permitted us to employ a diversity of measures and manipulations, so
that possible ambiguities regarding one procedure could be remedied in another. We had participants
make binding and non-binding choices. In some studies we assigned them to make choices or not, and
in others we measured how many choices they had spontaneously made. We allowed them unlimited
time to choose, or we cut them off prematurely. We measured self-regulation in terms of how long
they could hold a hand in ice water, how much they procrastinated while studying, how long they
persisted on unsolvable puzzles, and how long they tried and how well they performed on solvable
problems. We also employed a range of supplementary measures, including measures of emotion and
mood, self-ratings of fatigue, and perceived difficulty of the tasks.
The most parsimonious explanation for all these findings is that making choices depletes some
important psychological resource, indeed the same resource that is needed for self-regulation. But to
conclude that choice is costly or otherwise aversive would be unfairly one-sided — not to mention
disturbingly counterintuitive, insofar as people generally seem to want to have freedom to choose (e.g.,
Brehm, 1966). If choice is as costly as Experiments 1-5 suggested, but is also as widely desired as
many observations indicate, then it must offer some powerful benefits or consolations.
The benefits of choice were the focus of Experiments 6-7. These studies indicated that the
perception of having choice can mitigate the difficulty of performing unpleasant or onerous tasks. Put
another way, a lack of choice can take the form of having to perform tasks chosen by others, which
may require effortful self-regulation in order to accommodate oneself to these external dictates. In
Studies 6-7, people who performed tasks chosen by others subsequently showed poorer self-regulation,
as compared to people who did comparable tasks they had chosen themselves.
Self-Regulation and Choice, p. 45
Specifically, participants who chose their own task suffered less ego depletion than participants
who performed the same task without choosing it, in Experiment 6. Specifically, they subsequently
showed better physical stamina on a handgrip task. In Experiment 7, studying and doing practice
problems for an upcoming (and real) standardized test later made students who were externally
motivated perform poorly on a game that requires self-regulation of a speed-accuracy tradeoff. In
contrast, those who were intrinsically motivated to practice for the upcoming test, which means that
they felt the decision to take the upcoming test experiment, participants who were made to feel that
they were performing a number-search task by their own free choice, as was their own, performed
much better on the speed-accuracy tradeoff task.
Important previous work by Iyengar and Lepper (1999) provided evidence for the advantages
of choice. Their research showed that white American children were most motivated on tasks they
chose for themselves, whereas Asian Americans were most motivated on tasks chosen for them by
someone close them (e.g., their mother). However, they too showed low motivation on tasks chosen by
someone else when the other was outside of the self. The present findings extend those findings in
several ways. First, we used adults rather than children. Second, and more notably, we showed that
motivational effects went beyond the specifically chosen (or unchosen) task to affect performance on
other, unrelated tasks. Third, our studies measured performance quality and persistence (both of which
were affected by choice on the previous, unrelated task) rather than subsequent choice to perform the
task again. Taken together, the findings of Iyengar and Lepper and of the present investigation thus
show that having to make oneself perform tasks chosen by non-intimate others produces a broad range
of subsequent deficits, including not wanting to do the same task again (Iyengar & Lepper, 1999) and
performing worse on a different task (Experiments 6-7).
Alternative Explanations
The present investigation needed multiple experiments, partly because there is no single,
unambiguous measure of the constructs. There was no direct self-report measure of decision fatigue.
Likewise, there is no single gold standard measure of self-regulatory resource depletion, and so we
Self-Regulation and Choice, p. 46
measured self-regulation in many different behavioral spheres. The diversity of measures was
especially important and helpful because of the theoretical assumption that the same resource is used
for many diverse self-regulation activities as well as for effortful decision-making.
In any case, the use of many different procedures and measures should help to counteract
possible alternative explanations and increase confidence in the general conclusions about decision
fatigue and the costs and benefits of choice. Replication is generally regarded as boosting confidence
in research findings, and replication with different measures is important for providing converging
evidence.
In Experiment 4A, the experimenter had the informal impression that the choice procedure
seemed to take longer than the no-choice procedure, raising the possibility that the effects on self-
regulation were caused by the longer duration of the initial task (and hence a greater sense of having
discharged one’s obligation as research participant, or perhaps more urgent desire to finish and be on
one’s way). In the remaining studies, however, the time for the two tasks was kept rigidly equal, and
the results were the same. Experiments 2 and 4 used two different experimenters and blind testing
procedures. The results remained strong, and so the effects cannot be explained away in terms of
seeking to gain favor for the sake of getting a better gift. The two-experimenter system also permitted
blind testing, which can largely rule out explanations based on experimenter bias or demand
characteristics. Some of the procedures, such as evaluating psychology course materials or studying for
a standardized graduate school admissions test, pertain mainly to student life. However, we did include
field studies with non-university samples, and the results are the same. Thus it seems fair to generalize
these results beyond psychology students.
Some studies used persistence on unsolvable problems as the measure of self-regulation, on the
assumption that making oneself persist in the face of failure is aversive and difficult. A contrary view
might argue that persisting on unsolvable puzzles is a waste of time and therefore quitting is an
indication of good self-regulation. Against that view, however, we found that ego depletion caused by
decision making made people also quit faster and/or perform worse on solvable problems. In one study
Self-Regulation and Choice, p. 47
(Experiment 3) there was no difference between the choice and no-choice conditions on one measure
of performance quality, but the studies that systematically measured performance (especially
Experiments 4B and 5) confirmed poorer performance following choice.
It is conceivable that differences in mood and emotion could perhaps account for some of the
patterns we observed, especially insofar as the decision-making tasks might be regarded as inherently
more likely to generate aversive emotional states than the no-choice tasks. But many of our studies
contained (various) mood and emotion measures and the null results on these measures counteract the
view that mood or emotion mediated our results.
Finally it was important for us to empirically confirm that the experimental manipulations
about choice were effective. Experiment 1 showed that high-choice procedures made people feel more
that they were indeed engaging in decision-making, as well as putting more deliberate thought into the
task, than the low-choice procedures. The self was more involved in the high-choice than the no-choice
procedure, which is why we think that it expended more of its ego resources.
In short, although some findings may seem open to alternative explanations, we attempted to
provide evidence against these alternatives with other studies in the current investigation. The most
parsimonious explanation for these findings is that making choices depletes some valuable resource
that is needed for self-regulation, and thus self-regulation is impaired in the aftermath of decision-
making.
Concluding Speculative Remarks
The line of evolutionary development that led from simple, one-celled creatures to human
beings is marked by steadily increasing complexity and sophistication of cognitive processing. Why?
One view is that cognitive information processing essentially serves the process of choice, and so those
cognitive improvements improve creatures’ ability to adapt their behavior to multiple, complex, and
changing environments (Tomasello & Call, 1997). Put more simply, cognition evolved to serve choice.
By that view, human psychological processes represent an important leap forward in that same
direction. People can use logical reasoning, cost-benefit analyses, and other highly sophisticated
Self-Regulation and Choice, p. 48
decision-making procedures that may be difficult and costly but that open up possibilities for choosing
among multiple options in novel, unforeseen, and changing circumstances.
Why has evolution not conferred similar decision-making capabilities on many other species?
One answer, suggested by the present research, is that such sophisticated choosing is costly. It
consumes a notable quality of an important psychic resource, thereby leaving the individual less able to
self-regulate or make other decisions.
The present findings suggest that self-regulation and effortful choosing draw on the same
psychological resource, such that making choices impairs self-regulation. We speculate that the
capacity for effortful self-regulation evolved first, as social animals adapted to the need to override
their impulses and bring their behavior into line with external pressures, and that a later evolutionary
step exploited this capability for the sake of enabling complex human decision-making. The present
findings confirm that effortful choice is costly — and that the cost is paid in the same coin that pays for
effortful self-regulation. Given the huge adaptive benefits of self-regulation, it is reasonable to assume
that nature would only reluctantly add new functions that may sap self-regulatory resources and cause
impairments in people’s capacity for self-regulation.
The findings from our final two experiments also suggest, however, why that price was worth
paying (and paying with the precious resource used for self-regulation). Had nature designed human
beings to be mostly submissive automatons who bow to external authority, instead of actively making
their own choices, the demands on self-regulation would potentially have been even greater.
Accommodating oneself to external demands (including decisions made for the self by others) can
require self-regulation, including the substantial expenditure of regulatory resources. By making
choices for themselves, human beings can spare themselves some of the cost of accommodating to
external demands. As the present findings suggest, both the costs and the benefits of effortful choice
are registered in the same resource.
Self-Regulation and Choice, p. 49
Footnotes
1. The range of scores on the choice IM subscale was from 7-49 (M = 28.83, SD = 10.04); the
range of scores on the value/usefulness IM subscale was 13-49 (M = 28.00, SD = 11.17); the range for
the enjoyment/interest IM subscale was 8-50 (M = 25.33, SD = 8.25); and the range for the
importance/effort IM subscale was 14-35 (M = 23.50; SD = 5.44). We computed correlations between
the four subscales and found that the highest two correlations were between value and importance, r
(36) = .68, p < .01, and perceived choice and enjoyment, r (36) = .62, p < .01. Value and perceived
choice correlated at r (36) = .40, p < .02, and importance and perceived choice correlated at r (36) =
.16, ns.
Self-Regulation and Choice, p. 50
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Author Notes
Kathleen D. Vohs, Sauder School of Business – Marketing Division, University of British
Columbia; Roy F. Baumeister, Department of Psychology, Florida State University; Jean Twenge,
Department of Psychology, San Diego State University; Brandon Schmeichel, Department of
Psychology, Florida State University; Dianne Tice, Department of Psychology, Florida State
University; Jennifer Crocker, Department of Psychology, University of Michigan.
Preparation of this article was supported by National Institute of Health grants MH12794 (KV)
and MH 57039 (RB), funding from the Social Sciences and Humanities Research Council to Kathleen
Vohs, and support from the Canada Research Chair Council to Kathleen Vohs.
We thank Melissa Lassiter, Sloane Rampton, Denise Kartchner, Krystal Hansen, Mandee Lue
Chatterton, Louis Wagner, Allison Park, Erica Greaves, Karyn Cirino, and Megan Kimbrell for their
assistance conducting the studies included in this paper.
Correspondence concerning this article should be sent to Kathleen Vohs, Marketing Division,
University of British Columbia, 2053 Main Mall, Vancouver BC CANADA V6T 1Z2. Email:
vohs@sauder.ubc.ca.
Self-Regulation and Choice, p. 54
Table 1: Self-regulatory ability as a function of choice condition; Experiments 2-8
Choice
Condition
No Choice Condition
Dependent Variable
Experiment 2
27.70 (15.81)
67.42 (56.35)
Time Held Arm in
Freezing Water (secs)
Experiment 3
8.39 (3.64)
11.40 (1.66)
Time Spent Practicing
(minutes)
Experiment 4A
9.11 (3.00)
12.25 (4.31)
Persistence (minutes):
Unsolvable Puzzles
Experiment 4B
14.70 (4.05)
17.80 (4.66)
Persistence (minutes):
Solvable Puzzles
Experiment 5
3.04 (2.28)
4.54 (3.29)
Persistence (minutes):
Math Problems
Note: The data in this table are means and standard deviations (inside parentheses) relating to the effect
of choice condition on self-regulation ability. Higher numbers indicate better self-control. Rows denote
the experiment number from which the means were drawn. The first two columns are the conditions
representing Choice and No Choice, and the Dependent Variable column specifies the
operationalizations of self-regulation in each experiment. For Experiment 5, a median split on scores
from the psychological involvement in choices factor (see Experiment 1) was used to create the groups
of Choice and No Choice.
Self-Regulation and Choice, p. 55
Figure 1: Predicted performance (errors and speed) for Operation game at 1 standard deviation above
and below perceived choice scores; Experiment 7
-4
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
01 SD Above 1 SD Below
1 SD Below
1 SD Above
Combined Speed-Accuracy Measure (Predicted)
Perceived Choice Scores
Note: The measure of “combined speed-accuracy” pertains to predicted performance values on the
game Operation, in which participants were instructed to make as few errors as possible while
completing the game in the least amount of time. Length of time to complete the task and number of
errors made were each standardized and aggregated; hence, lower scores indicate better performance.
“Perceived choice scores” refers to scores on the Intrinsic Motivation subscale (Ryan, 1982) and
pertains to perceptions of choice regarding an upcoming graduate entrance examination. Higher
perceptions of choice were predicted to lead to less self-regulatory depletion and therefore better
performance (i.e., more negative scores) on the speed-accuracy game.
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Challenging current notions in self-esteem literature, this volume offers new insights into efficacy, agency, and self-esteem as well as the influence of these constructs on psychological well-being. Articles -contributed by prominent researchers- contain substantial new theoretical and empirical research that focuses on a wide range of personality and motivational phenomena. In addition, this volume promotes new directions for future research.
Article
Choice conflicts between one's important values may cause negative emotion. This article extends the standard effort-accuracy approach to explaining task influences on decision processing by arguing that coping goals will interact with effort minimization and accuracy maximization goals for negatively emotion-laden decision tasks. These coping goals may involve both a desire to process in a thorough, accurate manner and a desire to avoid particularly distressing aspects of processing. On the basis of this extended framework, the authors hypothesized and found in 3 experiments that decision processing under increasing negative emotion both becomes more extensive and proceeds more by focusing on one attribute at a time. in particular, increased negative emotion leads to more attribute-based processing at the beginning of the decision process. The results are inconsistent with views that negative emotion acts only as an incentive or only as a source of decision complexity.
Article
Claims that attributions and their related behaviors may reflect a type of perceived control that is generally overlooked. People attempt to gain control by bringing the environment into line with their wishes (primary control) and by bringing themselves into line with environmental forces (secondary control). Four manifestations of secondary control are considered: (a) Attributions to severely limited ability can serve to enhance predictive control and protect against disappointment; (b) attributions to chance can reflect illusory control, since people often construe chance as a personal characteristic akin to an ability ("luck"); (c) attributions to powerful others permit vicarious control when the individual identifies with these others; and (d) the preceding attributions may foster interpretive control, in which the individual seeks to understand and derive meaning from otherwise uncontrollable events in order to accept them. (5½ p ref) (PsycINFO Database Record (c) 2012 APA, all rights reserved)