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https://doi.org/10.1177/0093854818789726
CRIMINAL JUSTICE AND BEHAVIOR, 201X, Vol. XX, No. X, Month 2018, 1 –20.
DOI: 10.1177/0093854818789726
Article reuse guidelines: sagepub.com/journals-permissions
© 2018 International Association for Correctional and Forensic Psychology
1
EXPLORING POLICE USE OF FORCE DECISION-
MAKING PROCESSES AND IMPAIRMENTS
USING A NATURALISTIC DECISION-MAKING
APPROACH
KELLY A. HINE
The Australian National University
LOUISE E. PORTER
NINA J. WESTERA
Griffith University
GEOFFREY P. ALPERT
University of South Carolina
ANDREA ALLEN
Clayton State University
As part of their duties, police regularly engage with citizens, which can result in the use of force. While we know how often
and under what circumstances officers use force, little is known about officers’ decision-making processes that lead to force.
The study took a naturalistic decision-making approach to analyze debrief sessions between 91 recruits and their trainers after
partaking in a use-of-force assessment scenario. Results show recruit’s decision making was more aligned with an intuitive
style rather than an analytical style. Recruits reported experiencing perceptual, cognitive, and physiological impairments that
influenced the way they assessed the situation and affected their ability to successfully execute force techniques. The findings
provide valuable insights into the theoretical knowledge around police decision making and how officers are making use-of-
force decisions in the field. This has real-world implications for training/education and could help reduce the effects of
decision-making impairments.
Keywords: police use of force; decision making; naturalistic decision making; law enforcement
Police encounters that result in force evolve in rapid, dynamic, and stressful conditions.
Poor decision making can potentially lead to dire consequences such as civil liability,
AUTHORS’ NOTE: The authors would like to thank the Queensland Police Service (QPS) trainers, especially
Senior Sergeant Damien Hayden, for their help and support with the data collection. The authors acknowledge
the assistance provided by the QPS. The views expressed in this material are those of the authors and are not
those of the QPS. Responsibility for any errors of omission or commission remains with the authors. The QPS
expressly disclaims any liability for any damage resulting from the use of the material contained in this publi-
cation and will not be responsible for any loss, howsoever arising, from use of or reliance on this material.
Correspondence concerning this article should be addressed to Kelly A. Hine, Centre for Social Research &
Methods, The Australian National University, Room 2.24, Beryl Rawson Building, Ellery Crescent, Canberra,
Australian Capital Territory 2601, Australia; e-mail: kelly.hine@anu.edu.au.
789726CJBXXX10.1177/0093854818789726Criminal Justice and BehaviorHine et al.
research-article2018
2 CRIMINAL JUSTICE AND BEHAVIOR
unrest, injury, and death. Several recent cases of deadly force by police in the United States
have resulted in social movements that question police use of force (such as “Black Lives
Matter” and “Hands Up, Don’t Shoot”), emphasizing public demand to better understand
police decisions. In response, major law enforcement groups have recently produced polic-
ing guidelines that stress the importance of de-escalation in police–citizen encounters, to
avoid or reduce violent behavior (see International Association of Chiefs of Police, 2017;
Police Executive Research Forum [PERF], 2016), and PERF (2016) offers a critical deci-
sion-making model to assist officers in such situations. Previous use of force literature has
focused on factors associated with force, and the outcomes of force, while paying little
attention to how officers make force decisions (Hine, Porter, Westera, Alpert, & Allen,
2018). This study examines the process police officers use to make decisions about force in
a training scenario. The findings provide insights into how officers make decisions in the
field, thereby providing a platform for training, policy, and procedures on use of force deci-
sion making that can be used as a model in all police agencies.
Before providing the details of the present study, we review the literature to determine
the factors that likely influence force decisions. However, while researchers are beginning
to understand what is occurring during use of force encounters and when officers are mak-
ing decisions about force, little is known about how they make those decisions. Our review,
therefore, then turns to decision-making processes, highlighting an emerging approach to
analyzing decision making, Naturalistic Decision Making (NDM), as a useful approach to
examining police decisions about use of force.
FACTORS INFLUENCING POLICE DECISIONS
While it is difficult to know and examine what someone is thinking, there has been some
progress in understanding factors that influence police decisions. Some police researchers have
examined factors that affect officers’ decisions to engage in law enforcement activities.
Researchers have examined officers’ decisions to stop and question some citizens and not oth-
ers (Alpert, Dunham, Stroshine, Bennett, & MacDonald, 2004; Phillips & Sobol, 2012) or to
stop and frisk (Fradella, Morrow, & White, 2016; White & Fradella, 2016). More specific to
use of force decisions, researchers have consistently found that the strongest predictor of police
using force is the suspect’s behavior, particularly when the suspect is being noncompliant and
resisting arrest (see Adam, 2015; Hine, Porter, Westera, & Alpert, 2016; Terrill, 2005; Terrill &
Mastrofski, 2002). Furthermore, clear and strict policies have been found to be an effective tool
in controlling discretionary decision making about the use of deadly force (Ferdik, Kaminski,
Cooney, & Sevigny, 2014; Fyfe, 1979, 1981, 1982; Terrill & Paoline, 2017; White, 2001).
Stenning et al. (2009) explored decision making in more detail to examine officers’ actual
thoughts about the use of force. Their examination of officers from seven different countries
found commonalities in the way officers justified force (such as the legal responsibility to
make arrests and as a legitimate response to suspect resistance). Furthermore, Davies (2015)
surveyed recruits to gain clearer insights into the factors that influenced officers’ use of
force decisions. She found threat/safety, justification, and situational factors all influenced
recruits’ decisions to shoot. Most recently, Hine et al. (2018) found recruits were consider-
ing suspect and situation factors when making decisions about force and, moreover, were
using these factors to assess threat and suitability of force type. These findings indicate that
a variety of factors about the person and the situation might affect an officer’s decisions and
actions; what remains unclear is how officers are making these force decisions.
Hine et al. / EXPLORING POLICE USE OF FORCE DECISION MAKING 3
Binder and Scharf (1980) proposed that the decision to use force (or not use force) is not
singular, but rather based on a series of choices. They suggested the final decision is contin-
gent upon a sequence of decisions and reactions. The notion of temporal unfolding of deci-
sions is evidenced throughout the policing literature (Bayley, 1986; Fyfe, 1988; Sykes &
Brent, 1983; Terrill, 2003, 2005; Toch, 1996). This highlights the dynamic nature of police
use of force encounters, with several decision points throughout, and information and
choices made at prior stages affecting decisions at later stages. Decision making is, there-
fore, a process. Knowledge of this process will help prepare officers for decisions during
encounters with citizens.
Outside of the use of force arena, some police research has explored how early informa-
tion can influence decision-making processes by examining the effects of priming and
expectancy prior to encounters on arrest decisions. R. R. Johnson (2009) found officers
were more likely to make drug arrests if they perceived that their agency prioritized and
rewarded them. Using vignettes, R. R. Johnson (2013) further found that officers primed for
negative affect (by thinking about a personal family conflict) were more likely to make an
arrest compared with officers primed for positive affect (by thinking about a happy family
experience). However, Mitchell and Flin (2007) found that “threat” versus “neutral” brief-
ings given prior to firearms training simulation exercises had no significant influence on
officers’ decisions to shoot. It is likely, then, that the information officers receive prior to,
and during, an event influences their decisions. It is unclear how officers may process this
information when making decisions during a force encounter, particularly regarding the
style of decision making (such as considering all options before making decisions or basing
decisions on instinct).
DECISION-MAKING PROCESSES
G. Klein (2008) describes making a decision as “committing oneself to a course of
action where plausible alternatives exist, even if the person does not identify or compare
these alternatives” (p. 457). While a variety of decision-making processes have been pro-
posed within the literature, the dual process model has dominated decision-making
research (Brown & Daus, 2015; Evans, 2008; Kruglanski & Orehek, 2007; Wang,
Highhouse, Lake, Petersen, & Rada, 2015). This model consists of two processes labeled
as “intuitive” and “analytical” (Behling, Gifford, & Tolliver, 1980; Hunt, Krzystofiak,
Meindl, & Yousry, 1989). An intuitive style of thinking is unconscious, automatic, quick,
and effortless in nature. It involves recognizing and identifying cues, and then matching
them to patterns organized in the individual’s long-term memory (Allen, 2011; Sinclair,
2010). This process is often described as a “gut feeling” (Evans, 2008; Kruglanski &
Orehek, 2007) or a “hunch” (Kenneth, 2010). For example, nurses described a sense of
“knowing” the best course of action that was gained by experience, which reflects similar
findings in other professions such as physicians and biologists (Agan, 1987). Evans
(2008) reviewed the literature and identified 13 various labels attached to the intuitive
processing style, including System 1, automatic, and impulsive, among others. Her review
also identified 23 attributes associated with an intuitive decision-making style, including
unconscious, implicit, automatic, low effort, and rapid, among others. Intuitive decision
making uses heuristics (or schemas) which speed up the decision-making process. In
policing, decision-making research has focused on automated implicit biases of officers.
4 CRIMINAL JUSTICE AND BEHAVIOR
Smith and Alpert (2007) suggested that racial biases are formed by officers after repeated
contact with minorities, which form schemas for future encounters (see also Correll, Park,
Judd, & Wittenbrink, 2002; James, James, & Vila, 2016; James, Klinger, & Vila, 2014;
James, Vila, & Daratha, 2012). While heuristics can lead to rapid decision making, they
are often considered to lead to errors and biases. However, just because a decision is made
using heuristics does not necessarily mean it will be inaccurate. More often than not,
intuitive decision making can lead to fast and accurate decisions (Cohen, 1981).
In contrast, analytical decision making is a more conscious, time-consuming, and effort-
ful process that involves weighing up all options individually and choosing the best
(Kahneman & Lovallo, 1993). Evans’s (2008) review found various labels were attached to
analytical decision making, including System 2, controlled, rational, systematic, and reflec-
tive, among others. Attributes found to be ascribed to analytical decision making include
conscious, explicit, controlled, high effort, and slow (Evans, 2008). Analytical decision
making is often considered to lead to correct and optimum decisions. However, it has also
been suggested to be a hindrance in situations where rapid decision making is required, and
complex tasks are involved (Allen, 2011).
NATURALISTIC DECISION MAKING (NDM)
During high-pressure situations, including some police–citizen encounters, officers may
not have the luxury of making slow, considered analytical decisions and, instead, rely on
intuition and experience (via real-world exposure or training; Alpert & Rojek, 2011; Dror,
2007). Indeed, Fyfe (2015) suggested that a “split-second syndrome” exists whereby rapid
decision making inhibits diagnostic capabilities, resulting in bad decisions. However, it can
be difficult to study an officer’s thoughts and decision processes in situations where force is
used. Traditional decision-making studies have relied on questionnaires administered to
people in the safe environment of an office or even their own home (Orasanu & Connolly,
1993; Zsambok & Klein, 1997). However, the environment can affect decision making:
People may make or explain decisions differently in a real-world setting (with all the pres-
sures that may entail) rather than an artificial environment.
A relatively recent approach that may usefully apply to police decisions under pressure
is NDM. This approach attempts to understand thought processes in a more dynamic natural
setting (G. Klein, 2008). Elements of NDM contexts typically include complex and shifting
goals, with multiple actors and influences, time pressure, uncertainty, and high stakes. The
NDM approach has been used to study decision making in a variety of such settings as
emergency rooms, aviation environments, military operations, and firefighting scenarios
(G. Klein, 2008). Police use of force encounters would also present many of the same fea-
tures (Alpert & Rojek, 2011) and are prime examples of situations to which the NDM
approach would apply. Such intense, uncertain, and rapidly evolving conditions are likely
to affect the way that officers are able to make decisions. Hence, to understand police use
of force decision-making processes, it is important that they are examined under similarly
intense (more naturalistic) circumstances.
As noted, it is unlikely that officers would be able to make slow, analytical decisions in
situations that are sufficiently high risk to involve physical force. The NDM approach pro-
poses that experience plays an important role in enabling people to make quick, intuitive,
decisions by categorizing information, such as by using heuristics. Indeed, scholars suggest
Hine et al. / EXPLORING POLICE USE OF FORCE DECISION MAKING 5
that intuition is built on prior experience, where experts are those who can draw from a rich
catalog of patterns from previous experiences (G. Klein, 2015). An expert tends to operate at
a highly intuitive and subconscious level compared with a novice. Greitzer, Podmore,
Robinson, and Ey (2010) outlined that a highly experienced person does not need to consider
all options, whereas a moderately experienced person relies on more rule-based decisions
(such as if x occurs, then y follows). Finally, novices rely on a more analytical approach.
Essentially, NDM takes a knowledge-based approach in that people are said to base deci-
sions on their prior knowledge and experiences. The higher the level of knowledge and
expertise, the more intuitive the decision-making process becomes—leading to more accu-
rate and rapid decision making.
NDM proposes the Recognition-Primed Decision (RPD) Model to explain how
experts can make rapid decisions without the time-consuming need of comparing all
options (G. A. Klein, 1993). The model is based on the idea that decisions are made by
matching current situations to past situations (from long-term memory; Zsambok &
Klein, 1997). Experts use mental simulation to imagine the outcome of an action. The
model suggests that, rather than looking at all possible options in making a decision,
experienced individuals select the first workable option (similar to satisficing heuris-
tics). This suggests that if officers encounter similar situations to those encountered in
the past, then they will act more rapidly using an intuitive process. Conversely, if offi-
cers encounter a new situation, then this will take longer to access and process, relying
on a more analytical approach. Hence, the model is in part intuitive (the use of pattern
matching) and in part analytical (the use of mental simulation). It also highlights the
importance of variations in training to prepare officers for rapid decision making in the
variety of situations that they will encounter in the real world.
IMPAIRMENTS TO DECISION MAKING
NDM research has highlighted that someone’s course of action “inextricably depends on
how they understand the situation” (Kaempf, Orasanu, Zsambok, and Klein, 1997, p. 11).
Stress may affect how decisions are made and produce impediments to decision making.
Several factors throughout an encounter can affect officer performance (the accuracy and
efficiency of decisions). There are three main stress responses that affect policing: percep-
tual, cognitive, and physiological (Andersen & Gustafsberg, 2016; Arnetz, Arble, Backman,
Lynch, & Lublin, 2013). Perceptual impairments involve distortions in the body’s sensors
due to the fight or flight response in times of stress, such as experiences of tunnel vision or
auditory exclusion (Andersen & Gustafsberg, 2016). Time can also feel as though it is slow-
ing down and sounds may be amplified or softened (Andersen & Gustafsberg, 2016).
Perceptual impairments can affect how officers perceive the situation. Interviews with 80
officers who had shot citizens in a total of 113 incidents revealed that almost all officers had
experienced altered perceptions—most commonly diminished sound, tunnel vision, and
time distortions (Klinger, 2004). More broadly, this may also include issues of situational
awareness; for instance, an officer may narrow their attention to one particular aspect of the
encounter to the exclusion of seeing and hearing other crucial information. Cognitive
impairments include memory deficits, such as an officer’s ability to encode, store, and
recall information from memory. This can affect how officers make logical decisions,
including their ability to draw on stored information such as training techniques and tactics
6 CRIMINAL JUSTICE AND BEHAVIOR
(B. Johnson, 2008). Finally, physiological impairments affect fine motor skills due to the
body’s adrenalin response of fight or flight in times of stress. While this stress response
helps to improve gross motor skills (running, punching/kicking, etc.), the increase in heart
rate and respiration can counteractively decrease coordination and accuracy (e.g., the fine
motor skills needed in precision shooting; Everly & Lating, 2013; B. Johnson, 2008).
Physiological impairments can affect how officers physically react—their ability to use
force, which in turn affects their decisions about the use of force. Identifying impairments
to officers’ decision making can assist education and training practices to control them, or
prevent them from occurring, and in turn reduce their impact on decision making during
police use of force encounters.
THE PRESENT STUDY
The present study applies the NDM framework to explore how police officers are mak-
ing decisions in situations that result in force. The NDM framework advocates exploring
decision making in naturalistic settings and allows decision-making processes to be exam-
ined in terms of the level of analysis or intuition that is evident, as well as the role of expe-
rience in decision making. The present study explores police recruits’ decision-making
processes and impairments. Recruits provide an interesting population as they possess a
moderate level of experience—while they are more experienced than the average citizen
(as at this point they have received all the training required to be an operational officer),
they do not yet possess real-world experience. The present study is one of the first to exam-
ine how police make use of force decisions in a naturalistic environment; therefore, the use
of recruits also provides a baseline from which future research can explore the effects of
real-world experience on decision making. As proposed by NDM, under uncertain and
time-pressured circumstances of potentially volatile police encounters, it is predicted that
officers will more likely make intuitive decisions, rather than slower, systematic analytical
decisions. However, due to their lack of real-world experience, recruits may not yet be able
to rely fully on intuition. Instead they may use rule-based decisions and match circum-
stances to their previous training and experiences. Understanding the processes officers
are using to make decisions about their use of force will provide insights into why officers
are making certain decisions. This can inform policy makers and trainers as to best prac-
tices for preparing officers for police–citizen encounters to minimize or avoid uses of
force.
METHOD
DATA SOURCE
The data consisted of audio recordings of debriefs between Queensland Police Service
(QPS) recruits and trainers, in which recruits were asked to describe their decisions and
actions in relation to a simulated scenario. As part of their final assessment (at the end of
their 25-week training program), recruits partake in two role-playing scenarios (described
below). The debrief session took place immediately after the scenario. The debrief record-
ings were on average 15 min long, ranging from 3 to 40 min, and transcribed by one of the
authors.
Hine et al. / EXPLORING POLICE USE OF FORCE DECISION MAKING 7
SAMPLE
All recruits from one intake (96 recruits) between December 2012 and February 2013
were invited to participate, which resulted in the consent of 91 recruits. The sample comprised
recruits who had acquired all the training required to become operational field officers
(after the successful completion of the scenario assessment, this sample will be making
real-world force decisions). Participants were mostly male, with 23.48% female, which is
reflective of the proportion of sworn officers in Queensland. The average age was 28 years
(range, 20-46 years).
THE SCENARIOS
The role-play scenarios formed part of the existing assessment for QPS recruits and were
designed to be as realistic as possible, allowing the recruits to use force.1 During each sce-
nario, recruits interact with a role-player in real time to provide a tactile and responsive
environment reflective of the real world (as opposed to vignettes or virtual simulations).
Officers were verbally briefed with a minimal amount of information before entering the
scene, designed so that they would enter an ambiguous and dynamic situation. Recruits
were tasked with resolving the “incident” and were able to respond using any of the force
options provided by the QPS (see Table 1), although, for safety reasons, some of the accou-
trements were replaced with simulated versions. Trainers played the role of a suspect.2
Role-players escalated or de-escalated their behavior in response to recruits’ actions, but
this behavior was scripted to ensure a degree of consistency. All recruits participated in two
scenarios (domestic violence and disturbance) in pairs alternating the role of lead officer
TABLE 1: Frequency of Force Types per Overall Decisions
Force type Description Frequency
Presence The presence of a uniformed officer at the
scene
All scenarios commenced with
police presence
Communication skills Verbal directions and conversations to
persuade compliance
All scenarios commenced with
communication skills
Situational
containment
Restriction of access—may include creating
barricades, lockdowns, etc.
0
Tactical withdrawal Strategic retreat to remove safely from
situation
0
Restraining
accoutrements
Use of restraining accoutrements such as
handcuffs to restrain the subject
All scenarios ended with the
role-playing suspect being
handcuffed and searched
Open hand tactics Blocking, restraining, joint locks, pressure
points, pain compliance. Does not include
punching, kicking, etc.
80
Closed hand tactics Includes punches, kicks, knee strikes, etc.
Baton Impact weapon 6
Oleoresin capsicum
(OC) spray
Gas spray that can result in eye swelling,
temporary blindness, pain, etc.
10
Conducted energy
weapon (Taser)
Stunning device that produces an electric
shock that can result in temporary muscle
contractions and incapacitation
17
Firearm Service issue rearm 0
8 CRIMINAL JUSTICE AND BEHAVIOR
(see Table 2 for details). Adding to the high-stakes environment was the fact that recruits
were being assessed on the situation and must pass to graduate from the academy.
ANALYSIS AND CODING
Thematic analysis of the transcripts was conducted using NVivo software to manage and
organize the data. Coding was conducted by two authors who double-coded all transcripts
and agreement was reached. Cohen’s κ indicated a good inter-rater reliability, κ = .78,
p < .001. A code book was developed from the NDM literature. Broad themes included
decision-making processes (analytical and intuitive styles) and decision-making impair-
ments (perceptual, cognitive, and physiological). To identify decision-making processes, all
force decisions were first identified as the unit of analysis. Then, the force decision was
coded (see below). Impairments were extracted independent of the force decision and then
broken down into perceptual, cognitive, and physiological impairments. These are described
below.
TABLE 2: Scenario Descriptions and Debrief Questions
Scenario Description Debrief questions
Domestic
violence
Recruits were briefed that a victim had attended the
police station to make a domestic violence complaint
and an address was provided. The scenario involved
the recruits attending the address to investigate the
complaint. The scenario is designed to require the
recruits to detain a suspect for domestic violence.
All scenarios commenced with recruits using
communication skills and the role-playing suspect
provided slight resistance by not cooperating with
recruits’ directions and verbal commands. The
suspect displays this resistance verbally only—
without any physical threats or assaults. The suspect
concealed a knife in their boot which was designed
for recruits to locate and recover during the search of
the suspect. Suspects are then scripted to respond
based on recruits’ decisions; to physically resist any
contact by recruits, but to comply with the deployment
of OC spray (i.e., being sprayed) and the presentation
of rearms or Tasers.
At the conclusion of the scenario,
trainers conduct a debrief with recruits
specically addressing the following:
Explain threat assessment process
What tactical considerations existed?
What use of force options was
considered/used?
Discussion that “Situational Use of
Force” model is not restrictive and that
officers can escalate or de-escalate
their use of force as necessary
Were their actions authorized?
Were they justied?
Were the use of force options
reasonable, proportionate, and
appropriate?
Would the use of force options be
legally defensible?
Were their actions tactically sound and
effective?
What went well?
What would you do differently in future?
Discussion of good practice
Disturbance Recruits are briefed that the scenario involves reports
of a person under the inuence of alcohol creating
a disturbance outside a nightclub. When recruits
arrive at the scene the suspect is banging on the
wall demanding to be let back into the nightclub to
collect their belongings. All recruits initially used
communication skills; however, the suspect ignores
officers’ directions and verbal commands. As above,
suspects are then scripted to respond based on
recruits’ decisions; to physically resist any contact
by recruits, but to comply with the deployment of OC
spray (i.e., being sprayed) and the presentation of
rearms or Tasers (CEW weapon).
Note. OC = Oleoresin Capsicum; CEW = conducted energy weapon.
Hine et al. / EXPLORING POLICE USE OF FORCE DECISION MAKING 9
Force Decisions
Force decisions were coded as the decision to use or not to use force, or to use higher or
lower levels of force. Force was defined according to the QPS force options (see Table 1).
To determine decision-making styles, searches for Analytical and Intuitive themes were
conducted. Force decisions were coded as Analytical when officers were systematically
considering all possible options. Analytical decisions were coded according to Evans’s
(2008) analytical attributes and were coded if recruits’ descriptions indicated that they were
conscious, explicit, controlled, slow, reflective, logical, sequential, or high effort. In addi-
tion, to capture the analytical part of the RPD model, mental simulation was coded if the
recruit described imagining the outcome before deciding on their actions.
Conversely, Intuitive force decisions were coded if the recruit described an automated
response such as a “gut feeling” or a “hunch.” In line with Evans (2008), decisions were
also ascribed to intuition if they were deemed unconscious, implicit, automatic, rapid, or
low effort. In addition, intuitive decisions are based on pattern matching and heuristics.
Accordingly, intuitive decisions were further broken down to include heuristics, such as
satisficing, elimination by aspects, representative heuristics, availability heuristics, and
anchoring. Pattern matching also captured the intuitive part of the RPD model and was
coded when officers described recognizing similar features of the present encounter to those
of past experience.
NDM proposes that experience plays an important role in intuitive decision making.
Experts are said to draw from prior experiences, whereas novices rely on rule-based deci-
sions. Accordingly, to identify the role that experience played in the recruit’s decision mak-
ing, prior experience and rule-based decisions were coded. Previous experience was coded
when recruits referred to using previous experiences in making decisions (such as their
training, previous occupational experiences, or other life experiences) and rule-based deci-
sions was coded when recruits expressed decisions were based on an “if, then” decision-
making process.
Decision-Making Impairments
Decision-making impairments were coded as Perceptual, Cognitive, and Physiological.
Perceptual impairments included reported experiences that could be considered evidence
for sensory distortions. This also included broader situational awareness issues where
recruits focus on one aspect of the encounter to the exclusion of hearing or seeing other
aspects. Cognitive impairments were coded if the recruit described memory deficits or
errors in their logical thinking, whereas physiological impairments were coded if fine motor
skills were reportedly affected.
RESULTS
DECISION-MAKING PROCESSES
Examination of how recruits were making decisions found no evidence of recruits using
a purely analytical approach to their force decisions (where all force options were consid-
ered systematically). Of the decisions coded, 51.35% considered one alternative option,
29.73% considered two alternative options, and 18.92% considered three alternative options
from the eight3 possible options available for coding purposes. There were no occurrences
10 CRIMINAL JUSTICE AND BEHAVIOR
of recruits describing that they considered four or more options when making their deci-
sions. To illustrate, the following recruit described considering the use of a Taser, and ruled
out the use of OC spray, and actually decided to use hands-on tactics:
Honestly, when I first saw him I thought he is a big guy and if this turns bad I will consider
using Taser. Just cause he’s so big. But we were kind of really close weren’t we and he wasn’t
facing us so I thought hands on, let’s just do it. I didn’t want to use OC in case there’s heaps of
people around. (Recruit 71)
Because recruits were only considering a small number of force options, this suggests they
were using an intuitive approach when making decisions about force. A small number
(8.79%) of recruits also described an automated response reflective of intuitive decision
making. When discussing the successful execution of force, recruits described not realizing
how the result had happened. These recruits spoke about how smooth, quick, and natural it
felt, but not the actual logistics of the maneuver:
I think it just happened so quick. It felt really, really smooth. He wasn’t giving us his arm. He
fell pretty quickly but next thing I remember is going for his arm and having him in an arm lock
and that all happened probably in what feels like 30 seconds. (Recruit 2)
Many of the recruits’ responses provided evidence that they were relying on a variety of
heuristics as part of this intuitive approach (81.32% of decisions). A deeper examination of
the heuristics used shows evidence of recruits using elimination-by-aspects heuristics
(51.35%) where recruits used categories as a process of exclusion to make their force deci-
sion. In particular, recruits spoke of “accoutrements” (categorizing Tasers, OC spray, baton,
firearm, etc.) in terms of eliminating them all as a force option: “at that point, we deemed it
was appropriate to go open hand tactics—there was nothing really raising the threat level
for an accoutrement at that point” (Recruit 16). In addition, there was evidence to suggest
that recruits were using satisficing heuristics in their decisions (31.25% of decisions).
Recruits would select the first workable option under the time-pressured and difficult situ-
ations, “so, it was pretty much an option of hands-on. If that didn’t work, we could have
gone to an accoutrement” (Recruit 22). Recruits were also using availability heuristics to
make decisions (15.25% of decisions). For example, in response to the trainer’s question
about how well the recruits had executed a maneuver, she or he responded that they had
previously performed the same maneuver in similar circumstances during training the pre-
vious day, so it was fresh in their memories “because we’d done a similar scenario in the
practice ones where we had the role player up against the wall and she was just squirming
with her legs” (Recruit 21).
While these findings indicate that recruits used an intuitive approach to make use of force
decisions, the above quote illustrates that recruits were also using pattern matching to make
intuitive decisions. In particular, recruits were matching the current situation to previous
situations during training. In addition, most recruits (52.74% of recruits) described the use
of mental simulation to envision how the encounter would unfold, as proposed by the RPD
model. The use of mental simulation is conscious and deliberate, which reflects the analytical
part of the RPD model. While recruits did not use an analytical approach to systematically
consider all options, they did use analytical thinking in the form of mental simulation:
Hine et al. / EXPLORING POLICE USE OF FORCE DECISION MAKING 11
I considered that if I’d [OC] sprayed him, it would have antagonized the situation—he may
have come at us anyway leaving us no choice but to take him down. I thought eliminate the OC
spay and Taser and go straight for closed-hand tactics. (Recruit 122)
Reflecting their experience level, recruits demonstrated a reliance on rule-based deci-
sions. Recruits assessed that if the suspect behaved in a certain way or a certain situation
was presented, then a particular type of force should be chosen. For instance, the following
recruit explained that they would use a different type of force (i.e., hands-on or OC spray)
depending on the different circumstances (i.e., intoxicated or presence of bystanders,
respectively):
I would have started with presence and communication skills, but given that he was kicking the
walls, then there may be a bit more of an aggressive use of force maybe. The hands-on, given
that he had some drink. Potentially OC spray if there was no one else around but, being outside
a bar, it may not have been an option. (Recruit 68)
Some recruits’ responses (10.98%) suggested that they also drew on prior experiences
such as previous occupations or police training (like the previous quote where the recruits
drew on their experience of training). One recruit explained that he or she was able to pro-
vide clearer directions than other recruits because he or she was able to draw on his or her
previous experience as a life guard and therefore was able to verbally control the situation
rather than relying on accoutrements in his or her force decisions: “I used to be a life guard,
and talking to a lot of tourists, telling them where not to swim, I used to use my hand”
(Recruit 22). While another recruit talked about childhood experiences when describing
their approach. The recruit explained that when he or she was unable to successfully exe-
cute a maneuver (due to the suspect being sweaty), he or she drew on his or her experiences
of school yard wrestling: “yeah, I ended up improvising and going back to the school yard”
(Recruit 108). Overall, most of the time recruits were considering only one or two alterna-
tive force options. This lack of systematic consideration of the full range of alternatives, as
well as evidence that heuristics were in use, suggests that recruits were using intuitive deci-
sion making.
IMPAIRMENTS
Recruits reported experiencing impairments in all three areas (perceptual, cognitive, and
physiological) during the scenarios. However, most often recruits reported experiencing
cognitive impairments. More than a third (34.07%) of recruits experienced cognitive impair-
ments which can impede officers’ ability to recall information that can help with decision
making during the scenario such as training and tactics. Mostly, recruits reported memory
malfunctions during the encounter such as having a “mind blank.” To illustrate, one recruit
“blanked” on both his or her partner’s name and his or her own name: “in both [scenarios]
you forgot my name, you were like Constable umm and you forgot your own name” (Recruit
108). Other examples of memory malfunctions included recruits not realizing how they got
to a certain point or forgetting how to execute a maneuver or procedure:
Trainer: And what did you notice about your Taser?
Recruit 13: I probably didn’t turn it on or something . . .
Trainer: You didn’t turn it on, which is why the role player swiped at it . . . You’re fortunate that in the last
split second you realized you hadn’t turned it on and you went bang bang almost in a simultaneous
12 CRIMINAL JUSTICE AND BEHAVIOR
movement and you managed to activate it just as he was about to sweep it out of your hands. So you
weren’t even conscious of that fact?
Recruit 13: No
While only 10.99% of recruits reported experiencing perceptual impairments, such
impairments can impede officers’ abilities to assess the situation (what they see and hear).
A small number (7.69%) of recruits suffered failures of situational awareness similar to tun-
nel vision, where they focused on a particular aspect of the encounter ignoring other impor-
tant information. For example, one recruit described focusing on the suspect’s behavior to
the extent that it resulted in providing incorrect identifying information:
I stuffed up on the date of birth, wholly and solely because I was more looking at his mood, his
positioning and his stance and the rest of it and not paying a huge amount of attention to what
he was saying. (Recruit 145)
Another recruit explained that the situational awareness failures of his or her partner,
who was focusing on one of the suspect’s arms, resulted in his or her partner’s unawareness
of the rest of the suspect’s body (such as the legs) which could potentially result in officers
being kicked and injured: “[partner] sort of grabbed the arm and was just looking at the arm
and wasn’t looking at what his legs were doing or what his head was doing” (Recruit 2).
Three recruits experienced auditory exclusion—they did not hear crucial information that
was being said by their partner, the suspect, or the trainer. The consequences of auditory
exclusion are exemplified in the following case. The recruit was using hand tactics to con-
trol the situation; however, the maneuver was becoming potentially dangerous and started
to put the role-player at risk of injury. The trainer (and others) attempted to intervene; how-
ever, the recruit did not “hear” the warning to stop: “there was three of us yelling at you to
back off and for whatever reason you didn’t hear it because it does get like that” (Trainer to
Recruit 139).
Physiological impairments can hinder fine motor skills and the ability to execute force
techniques and use accoutrements. This can restrict their decision options (i.e., inability to
successfully execute a maneuver, which, therefore, is not considered as an option) or the
effectiveness of the decision outcome. Recruits reported suffering physiological symptoms
(7.69%) such as rushes of adrenalin, shortness of breath, tiredness, dry mouth, and shakes.
One recruit described that because he or she was so “amped up” and rushing forward with
the procedure, he or she forgot to do part of the standard procedure: “I think I just got so
amped with the adrenalin pumping. I raced in and after I started, I thought shit, I’ve forgot-
ten something here” (Recruit 69). Another recruit explained that physiological impairments
affected his or her ability to communicate. This resulted in time delays and a shift in his or
her focus, affecting the decision-making process: “yeah for me, a dry mouth and its odd and
it kind of turns into Gandhi’s flip flop4—it’s just weird” (Recruit 122). The effects of physi-
ological impairments to successfully execute force maneuvers were described by one of the
recruits. The recruit described that, due to the stress response of shaking, he or she was
unable to successfully execute his or her force technique chosen and as a result needed to
change tactics: “my knee was shaking so much, because my knees shake when I’m stressed,
and my hand was shaking a bit” (Recruit 1).
Hine et al. / EXPLORING POLICE USE OF FORCE DECISION MAKING 13
Hence, most recruits reported cognitive, perceptual, and physiological impairments dur-
ing the scenarios and provided insights into the consequences of these impairments. In
particular, consequences included the potential of being misinformed, resulting in incorrect
assessments of the situation, potential use of excessive and unnecessary force, or the failure
to successfully execute force tactics and accoutrements, which could result in injury to offi-
cers or suspects. Yet some recruits (3.30%) reported they experienced no or minimal impair-
ments. For example, one recruit, when asked whether they found it difficult under the stress,
replied,
No—I certainly think I’ve received sufficient training to do that. And the more you do it, the
better you get at it. And the more experience you get under your belt, it will become second
nature to you. (Recruit 122)
This recruit highlights the important role that experience plays. Experience not only aids in
rapid decision making but may also help to manage the stress of the event and allow for
clearer information processing.
DISCUSSION
The present study applied a naturalistic decision-making framework to explore how
police make decisions about using force. Overall, recruits were using a decision-making
style that was more aligned to intuitive rather than analytical decision-making processes.
This was evidenced by automatic unconscious decision making and the use of pattern
matching and heuristics. However, recruits were using mental simulation to envision the
outcome, which is consistent with the RPD model and indicative of analytical thinking. The
findings also revealed impairments of the decision-making process. Recruits described cog-
nitive, perceptual, and physiological impairments, with some resulting in potentially dan-
gerous situations or inappropriate uses of force. These findings provide insights into how
officers are making decisions about force in the field and can help inform the development
of appropriate policies, procedures, and training. The findings also demonstrate the benefits
of scenario-based training to allow recruits to practice and make mistakes in “safe” environ-
ments where they can reflect on their decision making.
HOW WERE RECRUITS MAKING DECISIONS?
During the role-played use of force scenarios, recruits appeared to be using an intuitive
decision-making process. This is consistent with the prediction that, during uncertain and
time-pressured circumstances, people are more likely to make intuitive decisions (Alpert
& Rojek, 2011; Dror, 2007; G. Klein, 2008). There was no indication that recruits were
using a slow and sequential process reflective of analytical decision making to consider all
available options. However, there was evidence that recruits were using pattern matching
and heuristics to make decisions about the use of force, as well as mental simulations to
envision the outcomes of various options, consistent with the RPD model. This process is
deliberate and analytical in nature. Hence, overall officers were using a blend of intuitive
and analytical decision making consistent with the suggestion that, rather than intuitive
and analytical decision making falling on opposite ends of a continuum, they are
14 CRIMINAL JUSTICE AND BEHAVIOR
independent decision-making styles that can work together (Allen, 2011; G. A. Klein,
1993; Wang et al., 2015).
NDM research (and the RPD model) highlights the importance of expertise in intuitive
decision making. Recruits were relying on rule-based decisions. This is consistent with
Greitzer et al.’s (2010) description of a moderately experienced person. While recruits are
more experienced than the average citizen, and those in this study had received all the train-
ing and experience required to be active field officers, they had not yet gained field experi-
ence. To become intuitive expert decision makers, further training and practice are required.
If police are using an intuitive decision-making style, a mismatch exists between real-
world decision making and the systematic approach recommended in policies and proce-
dures. Allen (2011) highlighted that, in typical policing legislation and policies, imposed
rules and guidelines are structured toward analytical decision making. The expectations are
for police to use and justify decisions based on careful, rational, analytical processes and
not on intuitive gut feelings. For instance, Queensland police officers are trained using the
Situational Use of Force Model in which officers are encouraged to consider all options
(QPS, 2016). Allen (2011) found that, despite being provided with information and instruc-
tions that encouraged compliance of analytical decision making, officers still used intuitive
decision-making styles.
The findings of the present study support the view that applying the traditional analytical
decision-making theories to policies is likely to be ineffective in use of force scenarios.
Considering all options may be difficult and even impossible in high-risk environments due
to the time pressure, task complexity, and environmental uncertainty. This has implications
for how policies and procedures are constructed. To best prepare officers for potential use
of force encounters, use of force policies and training procedures should acknowledge and
aid intuitive decision making during potential use of force encounters. In the present study,
there was evidence of recruits applying heuristics to speed up the decision-making process.
The use of heuristics may be helpful in bridging the gap between the analytical style wanted
in the policies and the intuitive style that is likely to occur during actual use of force encoun-
ters. Indeed, the key to narrowing the discord may lie in a combination of simplified poli-
cies and models, education of heuristics, and consistent and repetitive training in using
decision-making models. For example, PERF’s (2016) guiding principles provide a good
starting point for informing police agencies about best practices for policies, decision mod-
els, and training. PERF’s (2016) Critical Decision-Making Model aims to provide a struc-
tured, yet easy-to-use model to guide officers’ decisions. However, PERF also stresses the
importance of repetition and practice in using the model to develop “muscle memory” for
rapid and fluent (intuitive) responses.
WHAT WERE THE IMPAIRMENTS TO DECISION-MAKING PROCESSES?
In support of the NDM context of the scenario-based training utilized in this study,
recruits reported feeling under stress and experiencing a number of associated impairments.
Impairments to decision-making processes may help to explain unnecessary or excessive
force used by police unintentionally. Indeed, Fyfe (2015) highlighted that beyond “extrale-
gal” reasons, police violence can occur unnecessarily when well-meaning officers are inca-
pable of dealing with the situation. Recruits expressed experiencing cognitive, perceptual,
and physiological impairments. Recruits experienced cognitive impairments such as “mind
blanks” and memory malfunctions. The impact of stress on memory can result
Hine et al. / EXPLORING POLICE USE OF FORCE DECISION MAKING 15
in the inability to remember simple tasks (B. Johnson, 2008). Recruits also experienced
perceptual impairments can influence the way police hear and see the situation (Andersen
& Gustafsberg, 2016). Kaempf et al. (1997) highlighted the importance of accurately assess-
ing the situation as the course of action is selected based on this assessment. Perceptual
impairments can lead to misinformation and an incorrect assessment of the situation. Similar
to Klinger (2004), the present study found recruits experienced auditory exclusion and per-
ceptual awareness failures similar to tunnel vision. Finally, physiological impairments
affected some recruits’ ability to execute force techniques and accoutrements during use of
force encounters (B. Johnson, 2008). The presence of these impairments provides insights
into why officers may make poor decisions, resulting in the use of too much or too little
force. Incorrect assessment of the situation, memory malfunctions, and physiological dif-
ficulties may adversely affect decisions and the ability to control a suspect. Furthermore,
due to cognitive, perceptual, or physiological impairments, officers may be unaware of the
extent of their use of force in controlling a situation and may be unintentionally using exces-
sive or unnecessary force. During police use of force scenarios, officers are more likely to
make decisions intuitively—such impairments can impede this process.
IMPLICATIONS
These findings highlight the importance of simplified policies and scenario-based train-
ing for police. Officers need to understand all available force options and the strength, limi-
tations, and suitability of each. Through training, schemas (heuristics) can be learned and
then called upon when in high-pressure situations to guide decision making. This will limit
the cognitive capacity needed to make decisions by only considering relevant options—not
every option. Furthermore, officers need to develop the skills to use the different force
options implicitly, so valuable mental resources (that could be used for decision making)
are not dedicated to operating the equipment. This means that skill development and simu-
lating real-life conditions need to be continually conducted once foundation skills are learnt.
Training should focus on potential decision-making impairments, to prepare officers for
such experiences and to reduce their effects. For example, Andersen and Gustafsberg (2016)
showed that officers provided with a program designed to control stress during critical inci-
dents performed better and made a greater number of correct force decisions than officers
who did not undertake the program. Stress reduction techniques may also include training
simulations in realistic and tactile environments. Weekly combat sports (such as martial
arts) may improve responses to high-anxiety situations (Renden, 2015), while stress-induc-
ing activities (such as shooting a target while standing on one foot) also show promising
results to reducing the effects of impairments (Polis Solutions, 2018). Finally, meditation
practices including mindfulness may help coping with stressful situations (Yeoman, 2017).
In addition, our findings show the value of “live” training and debriefing to provide a
safe environment for officers to make and learn from mistakes and understand their behav-
ior and decision making. Frequent and repetitive training through use of force scenarios is
needed that is inclusive of a wide variety of variables to best prepare officers for such cir-
cumstances. Rajakaruna, Henry, Cutler, and Fairman (2017) found that the focus of training
should shift from performance and assessment to one that continually develops skills by
practicing and learning. Situations that differ from the typical scenario take longer to pro-
cess (Belmore & Hubbard, 1987), and officers who are slower in reacting may be at risk.
Hence, variations in training will help to develop a wider range of experiences to draw
16 CRIMINAL JUSTICE AND BEHAVIOR
from, resulting in faster decision making. Furthermore, the exposure to the stress inocula-
tion effect of these live conditions will reduce negative stress responses in real-world
encounters (Andersen & Gustafsberg, 2016). Therefore, educators and trainers should con-
sider incorporating training methods that increase officers’ awareness (Bargh, Chaiken,
Raymond, & Hymes, 1996) and provide officers with a wide variety of both typical and
atypical training scenarios. Teaming new/probationary officers with more experienced offi-
cers could also support continued teachings in real-world settings.
LIMITATIONS AND FUTURE DIRECTIONS
This is one of only a few studies to explore police use of force decision making and
impairments. Future research should replicate and expand the present study to examine the
decision-making processes of experienced officers and in real-world situations. The litera-
ture would suggest that experienced officers may be even more likely to make decisions
rapidly and rely on intuitive decision making. Such studies can provide further insights into
the heuristics being used, and their outcomes, which in turn will inform best practices for
future training and policies.
Measuring decision-making processes is difficult, however, as it relies on the person’s
ability for metacognition. The present study’s results show that recruits were able to articu-
late their decisions to some extent, but it is unknown to what degree this truly represents
their internal processes. While some people are better at metacognition than others, most
people with normal intelligence are able to engage in metacognitive regulation (Livingston,
2003). Future research could explore other methodological approaches to decision-making
measurement to overcome the present study’s limitations. Namely, the study was limited to
the reliance on officers’ retrospective reports. Like anyone’s memory for events, these
reports are open to bias (e.g., self-justification, rationalization), particularly where stakes
are high (e.g., where outcomes might affect an officer’s career or have legal implications),
and other attributes resulting from the fallibility of memory (e.g., forgetting, misinforma-
tion). While the focus of our study is on the process of the decision, and not the decision
itself (which may be more affected by these issues), the use of body-worn cameras during
the scenario-based training (or from real events) would help to support officers’ debrief
statements and supplement missing information. In doing so, a more robust body of knowl-
edge that provides insights into decision-making processes can be formed.
CONCLUSION
This study explored recruits’ decision-making processes and impairments during use of
force training scenarios and found recruits were primarily making force decisions intui-
tively. Policies and procedures that rely on systematic and analytical styles of decision mak-
ing may, therefore, be counterproductive. Furthermore, the recruits experienced perceptual,
cognitive, and physiological impairments that affected how some perceived and assessed
the situation and their ability to successfully perform force techniques and use accoutre-
ments. These deficiencies could potentially result in unintentional excessive or unnecessary
force as well as potentially dangerous situations with risk of injury to the officer or suspect.
Education and awareness about decision-making impairments, as well as training for stress
reduction and application of heuristics, can potentially reduce the effects of decision-mak-
ing impairments. Overall, our findings, if put into practice, can help prepare officers for
Hine et al. / EXPLORING POLICE USE OF FORCE DECISION MAKING 17
potentially dangerous situations and hopefully de-escalate encounters and reduce the use of
force.
NOTES
1. Naturalistic Decision Making (NDM) research has shown that participants often take studies in artificial environments
seriously; for example, Hammond (1993) stated it is not the location of the study by how something is studied and what is
being studied that is important.
2. In a small number of cases, fellow recruits role-played the suspect, but only after having completed the assessment
themselves.
3. All scenarios commenced with police presence and communication skills and ended with the suspect being handcuffed
and searched, therefore, these force options were not included in the coding.
4. Gandhi’s flip flop is slang for the effects of a dry mouth.
ORCID iD
Kelly A. Hine https://orcid.org/0000-0003-2497-2069
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Kelly A. Hine is a lecturer at the Australian National University and a researcher with the ANU Centre for Social Research
& Methods. Her research centers on police–citizen interactions, including the use of force by police and officer injuries. Her
research examines the decision-making process, and impediments to this process, during situations that are typically dynamic
and volatile. In addition to her research interest in frontline policing, her areas of expertise include police misconduct and
police integrity.
Louise E. Porter is a senior lecturer in the School of Criminology and Criminal Justice at Griffith University, Australia, and
member of the Griffith Criminology Institute. Her research on policing focuses on police misconduct and use of force, as well
as police oversight and integrity management.
Nina J. Westera was a lecturer in the School of Criminology and Criminal Justice at Griffith University, Australia, and was
a member of the Griffith Criminology Institute. Her expertise focused on investigative interviewing, especially complainants
of sexual and violent offending, and the use of police interviews as video evidence. An influential researcher and valued col-
league, she passed away in May 2017.
20 CRIMINAL JUSTICE AND BEHAVIOR
Geoffrey P. Alpert is a professor of criminology and criminal justice at the University of South Carolina and holds an
appointment at Griffith University. He is also a chief research advisor for National Institute of Justice (NIJ). For the past 30
years, his research interests have included police use of force, emergency driving, and the linkages between researchers and
practitioners.
Andrea Allen is associate professor of criminal justice at Clayton State University. Her research focuses on policing and is
published in outlets such as Crime & Delinquency, Journal of Quantitative Criminology, Police Quarterly, and Policing.