Craig Leth-Steensen- Carleton University
Craig Leth-Steensen
- Carleton University
About
43
Publications
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Introduction
Skills and Expertise
Current institution
Publications
Publications (43)
Previous research has demonstrated the presence of an effect (i.e., the spatial-numerical association of response codes or SNARC) in both numerical parity and magnitude judgment tasks in which smaller numerical magnitudes are manually responded to faster on the left side and larger numerical magnitudes on the right side. Such a result has typically...
The present study aimed to examine the links between a self-report measure known to be discriminative of autism (the AQ-10) and performance on the classic unidimensional absolute identification judgment task with 10 line lengths. The interest in this task is due to the fact that discriminating absolutely between such items is quite perceptually cha...
Previous research has demonstrated the presence of an effect (i.e., the spatial-numerical association of response codes or SNARC) in both numerical parity and magnitude judgment tasks in which smaller numerical magnitudes are manually responded to faster on the left side and larger numerical magnitudes on the right side. Such a result has typically...
Background: The COVID-19 virus is a worldwide pandemic health emergency. Although preventative measures have been put in place in an attempt to control its spread, their implementation has been met with resistance. Aims: To verify the nature of the health belief and personality factors associated with favorable attitudes toward face-mask use during...
The current study applied a latent profile analysis (LPA) to measures of autism traits collected from a sample of 1,018 university participants to test the research question of whether autism characteristics represent a unitary spectrum or a fractionation. Findings revealed the presence of four latent profiles of autism features that varied mainly...
Background
Although theoretical efforts have been made to address the cognitive learning styles of individuals on the autism spectrum, no instrument to measure such learning styles is currently available. The current study aimed to develop such a scale based on the learning style theory of Qian and Lipkin (Front Hum Neurosci 5:77, 2011).
Methods
R...
Background: Social and communication difficulties are a symptom of both social phobia and autism. One form of trait dimension that is extremely relevant to such difficulties is interpersonal sensitivity. Method: The differential relations that subclinical social phobia and autistic traits have with five facets of interpersonal sensitivity (interper...
Across two experiments, the numerical magnitude and the physical size of single digits presented in either two (Experiment 1) or four (Experiment 2) different font sizes were judged using either horizontally and vertically (Experiment 1) or just horizontally (Experiment 2) aligned manual responses. Such a design allowed for the simultaneous examina...
In the present study, factor mixture models (FMMs) were used to examine the latent structure underlying the Autism-Spectrum Quotient (AQ) among a sample of 633 undergraduate students. FMM represents a combination of latent-class, person-centered approaches and common-factor, variable-centered approaches to modeling population heterogeneity. Finding...
PlayWisely is a novel approach to early learning designed to target the positive development of a wide range of cognitive and physical/motor abilities by stimulating the rapidly developing brain of very young children (from 4 months to 3 years of age). The current pilot study represents a first step toward providing an evidence base for the efficac...
Introduction
Research on the moderating role of trait emotional intelligence (EI) has typically examined this construct in light of other risk factors and their detrimental effects on adolescents' outcomes. This study aims to expand this line of research by focusing on the enhancing effect of trait EI and its moderating effects on the relationship...
The inclusion of Buddhist mindfulness perspectives in second-generation mindfulness-based interventions (MBIs) offers an opportunity to explore the cultivation of ethical action in MBIs and address concerns about the purported absence of ethics in MBIs. This pilot study examined the relationship between mindfulness and value incongruence following...
Intermediate coding accounts have been used to provide an explanation for the spatial-numerical association of response codes (SNARC) effect and can be contrasted with the classic direct spatial mapping account of such an association (i.e., from the mental number line directly to the responses). Importantly, a study by Santens and Gevers (2008)'s h...
The current work examines the effect of trial-by-trial feedback about correct and error responding on performance in two basic cognitive tasks: a classic Stroop task (n = 40) and a color-word matching task (n = 30). Standard measures of both RT and accuracy were examined in addition to measures obtained from fitting the ex-Gaussian distributional m...
In this work, the role that spatial reference frames play in determining the spatial-numerical association of response codes (SNARC) effect is examined. Participants were instructed to generate an image of the numbers 1–9 oriented spatially in either a horizontal, vertical, or proximo-distal manner. Responses to a magnitude comparison task were the...
Performance in numerical classification tasks involving either parity or magnitude judgements is quicker when small numbers are mapped onto a left-sided response and large numbers onto a right-sided response than for the opposite mapping (i.e., the spatial-numerical association of response codes or SNARC effect). Recent research by Gevers et al. [G...
A large number of approaches have been proposed for estimating and testing the significance of indirect effects in mediation models. In this study, four sets of Monte Carlo simulations involving full latent variable structural equation models were run in order to contrast the effectiveness of the currently popular bias-corrected bootstrapping appro...
This study examined the relationship between autistic traits and adult attachment styles in a non-clinical sample of 326 university students. Multiple regression analysis was used to predict both attachment avoidance and attachment anxiety from levels of self-reported autistic traits. A significant unique relationship between autistic traits and at...
In the current study, a novel paradigm was used in which participants (N = 24) first compared the sizes of pairs of animals and then were asked, on half of the trials, to make a follow-up identification judgment regarding either the form of the comparative instruction that had just been used for the preceding comparison (i.e., smaller? or larger?)...
In each of two experiments the direction of a binary comparison was contingent on the category of the stimulus pair. In one experiment, participants had to compare the size of animals from memory. On congruent trials, they had to select the smaller animal if both were small and the larger if both were large and on incongruent trials they selected t...
Rape-supportive cognition is both theoretically and empirically related to rape. Several types of rape-supportive cognition (cognitive distortions) have been identified in the literature, suggesting that rapists’ rape-supportive cognition may be multidimensional. The Bumby RAPE Scale is one measure of rape-supportive cognition. The authors conducte...
Learning in bidirectional associative memory (BAM) is typically Hebbian-based. Since Kosko's 1988 [‘Bidirectional Associative Memories’, IEEE Transactions on Systems, Man and Cybernetics, 18, 49–60] paper on BAM in the late 1980s, many improvements have been proposed. However, none of the proposed modifications have allowed BAM to perform complex a...
With English-language readers in an experiment requiring pairwise comparative judgments of the sizes of animals, the nature of the association between the magnitudes of the animal pairs and the left or right sides of response (i.e., the SNARC effect) was reversed depending on whether the participants had to choose either the smaller or the larger m...
Similar to many other countries, Canada has witnessed a growing concern over gambling problems population and the potential for related negative consequences. Research results thus far highlight the heterogeneity of the problem gamblers and suggest game preferences may distinguish gambler types. This study entails an exploratory analysis of the gam...
Since the inception of the empirical study of personality, and even before it, individual differences in anxiety and distress have been viewed as key predictors of behavioral performance. Yet such literatures have always entertained 2 perspectives, one contending that anxious individuals are "driven" and the other contending that anxious individual...
In the present experiments, failures of selective visual attention were invoked using the B. A. Eriksen and C. W. Eriksen (1974) flanker task. On each trial, a three-letter stimulus array was flashed briefly, followed by a mask. The identity of the two flanking letters was response congruent, neutral, or incongruent with the identity of the middle...
On each trial of this study, participants either switched between or repeated two simple, two-choice tasks involving either letter or digit classifications. Speed-accuracy trade-off (SAT) curves were obtained using the response-signal method of eliciting speeded responses at various response time lags after the presentation of the stimulus for the...
Legalized gambling in Canada is governed by Provincial legislation. In Ontario, the Ontario Lottery and Gaming Corporation is responsible for all aspects of gambling in the Province. There have been a number of recent lawsuits against this Crown agency of the Government of Ontario by gamblers, most of which have been settled or otherwise resolved....
Over the last decade, researchers have debated whether anchoring effects are the result of semantic or numeric priming. The present study tested both hypotheses. In four experiments involving a sensory detection task, participants first made a relative confidence judgment by deciding whether they were more or less confident than an anchor value in...
In this study, the effect of lengthening foreperiod duration (i.e. the time between the presentation of a warning signal and a subsequent target stimulus) on choice RTs is examined. The foreperiod durations used were either 2 or 8s and were fixed within pure blocks of trials. The task was to determine whether a single-digit target stimulus was eith...
Semantic congruity effects (SCEs) were obtained in each of two experiments, one with symbolic comparisons and the other with comparisons of visual extents. SCEs were reliably larger when the instructions indicating the direction of the comparison were represented by consonant-vowel-consonant (CVC) nonsense syllables, which had been associated with...
In each of two experiments, the comparative instructions in a symbolic comparison task were either varied randomly from trial to trial (mixed blocks) or left constant (pure blocks) within blocks of trials. In the first experiment, every stimulus was compared with every other stimulus. The symbolic distance effect (DE) was enhanced, and the semantic...
Twenty participants made perceptual judgements involving bi-modal, bi- dimensional stimuli under various attentional allocation conditions, both with and without providing confidence judgements. Decreasing attentional allocation to a stimulus modality affected both RTs, accuracy, and confidence calibration measures. Rendering confidence increased b...
Is the locus of the problem-size effect in mental arithmetic different across cultures? In a novel approach to this question, the ex-Gaussian distributional model was applied to response times for large (e.g., 8 x 9) and small (e.g., 2 x 3) problems obtained from Chinese and Canadian graduate students in a multiplication production task (LeFevre &...
Localist networks represent information in a very simple and straightforward way. However, localist modelling of complex behaviours ultimately entails the use of intricate “hand-designed” connectionist structures. It is, in fact, mainly these two aspects of localist network models that I believe have turned many researchers off them (perhaps wrongl...
Response time (RT) distributions from three fixed foreperiod conditions (2, 4, and 8 s) in a warned four-choice RT task were obtained for a group of boys with attention-deficit/hyperactivity disorder, combined type (ADHD; n = 17) and for two groups of normal control boys (age-matched, n = 18, and younger-aged, n = 10). Quantitative measures of dist...
A cognitive process model is developed that predicts the 3 major symbolic comparison response time effects (distance, end, and semantic congruity) found in the results of the linear syllogistic reasoning task. The model includes a simple connectionist learning component and dual evidence accumulation decision-making components. It assumes that resp...
A cognitive process model is developed that predicts the 3 major symbolic comparison response time effects (distance, end, and semantic congruity) found in the results of the linear syllogistic reasoning task. The model includes a simple connectionist learning component and dual evidence accumulation decision-making components. It assumes that resp...
A cognitive process model is developed that predicts the 3 major symbolic comparison response time effects (distance, end, and semantic congruity) found in the results of the linear syllogistic reasoning task. The model assumes that people generate an ordering of a finite set of symbolic stimuli on the basis of information contained in the pairwise...
Questions
Question (1)
In a latent profile analysis (i.e., LPA), means, variances, and covariances can be estimated within each class/profile (with the variances typically set equal across classes and the covariances set to 0). However, Mplus seems to add one more parameter for each class (except the last) which are referred to as "Means" - what the heck are these (aren't the classes themselves purely nominal)? As well, I can't seem to determine for sure anywhere what the number of free parameters in a LPA is supposed to be compared to determine whether it is identified - is this just the number of cases in the overall sample?
