Hierarchical diffusion models for two-choice response times

Two-choice response times are a common type of data, and much research has been devoted to the development of process models for such data. However, the practical application of these models is notoriously complicated, and flexible methods are largely nonexistent. We combine a popular model for choice response times-the Wiener diffusion process-with techniques from psychometrics in order to construct a hierarchical diffusion model. Chief among these techniques is the application of random effects, with which we allow for unexplained variability among participants, items, or other experimental units. These techniques lead to a modeling framework that is highly flexible and easy to work with. Among the many novel models this statistical framework provides are a multilevel diffusion model, regression diffusion models, and a large family of explanatory diffusion models. We provide examples and the necessary computer code.     

An Examination of the Association between Difficulties with Emotion Regulation and Dating Violence Perpetration

The perpetration of aggression in dating relationships is a prevalent problem among college students. Research that examines factors related to perpetrating dating violence is needed, as this could help guide prevention programming. This study examined how emotion regulation is related to dating violence perpetration among male and female college students (N = 440). Findings showed that the association between broad difficulties with emotion regulation, as well as more specific emotion regulation problems, were associated with dating violence perpetration and could differentiate individuals who had perpetrated and not perpetrated aggression. These findings varied slightly depending on the gender of the perpetrator and the type of aggression examined. Implications of these findings for prevention programs and future research are discussed.     

Reciprocal influences between stress and internalizing problems in Korean adolescents: A cross‐lagged,longitudinal study

In the current four‐wave, longitudinal study, adolescent stress, internalizing problems, and the reciprocal influences of these variables were examined. Data were obtained from the Korea Youth Panel Study, which included 3188 (1594 male and 1594 female) middle‐ and high‐school students who enrolled in the study from 2004 to 2007. The mean participant age was 14.79 years in 2004. By using a cross‐lagged, autoregressive model, it was shown that stress levels and internalizing problems had reciprocal influences on one another over time (all four time points). At each of the time points, the effect sizes of stress on internalizing problems were significantly greater than those of internalizing problems on stress.     

Bias in older adults’ driving self-assessments: The role of personality

A convenience sample of 50 older drivers (M_age = 73.14, SD = 4.85) completed the Myers-Briggs Type Indicator® (MBTI®) Step III™ instrument and rated their own driving abilities (compared to all other drivers, same age drivers, and their own driving 20 years prior) and their ability to perform 68 specific driving-related behaviors. Each subject’s driving performance was also evaluated in a comprehensive on-road assessment conducted by a certified driving rehabilitation specialist, who rated the same 68 driving behaviors as well as driving performance. Drivers identified by the MBTI Step III instrument as Extraverted, Sensing, and (above median) Confident rated their driving significantly more favorably than Introverts, Intuitives, and below median Confidence drivers. Step III Sufficiency scales were associated with on-road performance: drivers with scores indicating low Confidence, low Stamina, or critical high levels of Compensatory Strain received significantly lower evaluations. Drivers with a Sensing preference or critical Strain score rated their driving significantly more favorably than evaluators did. These findings present preliminary evidence for the utility of personality assessments in identifying self-serving bias in driving self-evaluations, essential for safe self-regulation of driving.     

The presence of a best friend buffers the effects of negative experiences

The goal of the current study was to examine how the presence of a best friend might serve as protection against the effect of negative experiences on global self-worth and the hypothalamic-pituitary-adrenocortical axis (HPA axis). A total of 103 English-speaking male (n = 55) and female (n = 48) participants from Grade 5 (M = 10.27 years) and Grade 6 (M = 11.30 years) completed booklets about their experiences that occurred 20 min previously and how they felt about themselves at the moment, and they provided saliva multiple times per day over the course of 4 consecutive days. Having a best friend present during an experience significantly buffered the effect of the negativity of the experience on cortisol and global self-worth. When a best friend was not present, there was a significant increase in cortisol and a significant decrease in global self-worth as the negativity of the experience increased. When a best friend was present, there was less change in cortisol and global self-worth due to the negativity of the experience.     

Stanford-Binet and WAIS IQ differences and their implications for adults with intellectual disability (aka mental retardation)

Stanford-Binet and Wechsler Adult Intelligence Scale (WAIS) IQs were compared for a group of 74 adults with intellectual disability (ID). In every case, WAIS Full Scale IQ was higher than the Stanford-Binet Composite IQ, with a mean difference of 16.7 points. These differences did not appear to be due to the lower minimum possible score for the Stanford-Binet. Additional comparisons with other measures suggested that the WAIS might systematically underestimate severity of intellectual impairment. Implications of these findings are discussed regarding determination of disability status, estimating prevalence of ID, assessing dementia and aging-related cognitive declines, and diagnosis of ID in forensic cases involving a possible death penalty.     

Bad Woman, Bad Victim? Disentangling the Effects of Victim Stereotypicality, Gender Stereotypicality and Benevolent Sexism on Acquaintance Rape Victim Blame

Based on the assertion that previous research may have inadvertently confounded two stereotypes, we considered the impact of benevolent sexism on rape victim blame in the context of independent manipulations of gender and the perceived genuineness (victim stereotypicality) of an acquaintance rape victim. We predicted that for blame, benevolent sexism may be independently positively associated with gender and victim counter-stereotypicality. Following pilot work, 120 Australian undergraduates read an acquaintance rape scenario. Results indicated that benevolent sexism was only positively associated with blame of the gender counter-stereotypical victim when that victim was also counter-stereotypical in terms of victim stereotypes. This result indicates a more moderate role than previously indicated for benevolent sexism in accounting for rape victim blame.     

When apologies work: How matching apology components to victims’ self-construals facilitates forgiveness

Apologies are useful social tools that can act as catalysts in the resolution of conflict and inspire forgiveness. Yet as numerous real-world blunders attest, apologies are not always effective. Whereas many lead to forgiveness and reconciliation, others simply fall on deaf ears. Despite the fact that apologies differ in their effectiveness, most research has focused on apologies as dichotomous phenomena wherein a victim either (a) receives an apology or (b) does not. Psychological research has yet to elucidate which components of apologies are most effective, and for whom. The present research begins to address this gap by testing the theory that perpetrators’ apologies are most likely to inspire victim forgiveness when their components align with victims’ self-construals. Regression and hierarchical linear modeling analyses from two studies support the primary hypotheses. As predicted, victims reacted most positively to apologies that were congruent with their self-construals.     

Knowledge applied to new domains: The unconscious succeeds where the conscious fails

A common view holds that consciousness is needed for knowledge acquired in one domain to be applied in a novel domain. We present evidence for the opposite; where the transfer of knowledge is achieved only in the absence of conscious awareness. Knowledge of artificial grammars was examined where training and testing occurred in different vocabularies or modalities. In all conditions grammaticality judgments attributed to random selection showed above-chance accuracy (60%), while those attributed to conscious decisions did not. Participants also rated each string’s familiarity and performed a perceptual task assessing fluency. Familiarity was predicted by repetition structure and was thus related to grammaticality. Fluency, though increasing familiarity, was unrelated to grammaticality. While familiarity predicted all judgments only those attributed to random selection showed a significant additional contribution of grammaticality, deriving primarily from chunk novelty. In knowledge transfer, as in visual perception (Marcel, 1993), the unconscious may outperform the conscious.     

Anatomic Magnetic Resonance Imaging of the Developing Child and Adolescent Brain and Effects of Genetic Variation

Magnetic resonance imaging studies have begun to map effects of genetic variation on trajectories of brain development. Longitudinal studies of children and adolescents demonstrate a general pattern of childhood peaks of gray matter followed by adolescent declines, functional and structural increases in connectivity and integrative processing, and a changing balance between limbic/subcortical and frontal lobe functions, which extends well into young adulthood. Twin studies have demonstrated that genetic factors are responsible for a significant amount of variation in pediatric brain morphometry. Longitudinal studies have shown specific genetic polymorphisms affect rates of cortical changes associated with maturation. Although over-interpretation and premature application of neuroimaging findings for diagnostic purposes remains a risk, converging data from multiple imaging modalities is beginning to elucidate the influences of genetic factors on brain development and implications of maturational changes for cognition, emotion, and behavior.