Age differences in fluid intelligence: contributions of general slowing and frontal decline

The current study examined the contributions of general slowing and frontal decline to age differences in fluid intelligence. Participants aged 20-89 years completed Block Design, Matrix Reasoning, simple reaction time, choice reaction time, Wisconsin Card Sorting, and Tower of London tasks. Age-related declines in fluid intelligence, speed of processing, and frontal function were observed. Hierarchical regression analyses showed that the processing speed and frontal function measures accounted for significant variance in fluid intelligence performance, but there was also a residual effect of age after controlling for each variable individually as well as both variables. An additional analysis showed that the variance in fluid intelligence that was attributable to processing speed was not fully shared with the variance attributable to frontal function. These findings suggest that the age-related decline in fluid intelligence is due to general slowing and frontal decline, as well as other unidentified factors.     

Associations among early abuse, dissociation, and psychopathy in an offender sample

Theorists have postulated that some variants of psychopathy result from childhood abuse and neglect. Dissociative symptoms are also thought to arise from abuse. To date, the conjoint associations among abuse, dissociation, and psychopathy have not been examined systematically. Some have hypothesized that abuse relates primarily to the affective symptoms of psychopathy, with dissociative experiences mediating this relationship. Others have suggested that abuse more directly affects the impulsive lifestyle features of psychopathy. The authors used structural equation modeling to examine these hypotheses in a sample of 615 male offenders who had completed a retrospective self-report measure of childhood abuse, the Dissociative Experiences Scale, and R. D. Hare's (2003) Psychopathy Checklist--Revised. Abuse exerted no direct or indirect effect on the core interpersonal and affective features of psychopathy but was directly related to the facet of psychopathy associated with an impulsive and irresponsible lifestyle. Implications for psychopathy subtypes are discussed.     

The Potential of the Hybrid Course Vis‐à‐Vis Online and Traditional Courses

Abstract. Face‐to‐face, hybrid, and online courses are part of the panoply of course options available to students and teachers in the twenty‐first century. This essay tackles the promise of hybrid courses for enhancing student learning in seminary contexts. The author contends that the introduction of hybrid instruction prompts faculty to revisit questions about pedagogy and improves student learning.     

Mixed Theories of Punishment and Mixed Offenders: Some Unresolved Tensions

Mixed theories of legal punishment treat both crime reduction and retributive concerns as irreducibly important and so worthy of inclusion in a single justificatory framework. Yet crime reduction and retributive approaches employ different assumptions about the necessary characteristics of those liable to punishment. Retributive accounts of legal punishment require offenders to be more responsive to moral considerations than do crime reduction accounts. The tensions these different assumptions create are explored in the mixed theories of John Rawls, H. L. A. Hart, and Andrew von Hirsch. It is argued that none of these theories successfully resolve the tensions. The prospects for resolving them are then discussed.     

Executive functions and achievements in school: Shifting, updating, inhibition, and working memory

Links have recently been established between measures of educational attainment and both verbal and visuo-spatial aspects of working memory. Relationships have also been identified between specific executive functions—shifting, updating, and inhibition—and scholastic achievement. In the present study, scholastic attainment, shifting, updating, inhibition, and verbal and visuo-spatial working memory were assessed in 11- and 12-year-old children. Exploratory factor analysis identified two executive factors: one associated with updating functions and one associated with inhibition. Updating abilities were closely linked with performance on both verbal and visuo-spatial working memory span tasks. Working memory was closely linked with attainment in English and mathematics, and inhibition was associated with achievement in English, mathematics, and science. Domain-specific associations existed between verbal working memory and attainment in English, and between visuo-spatial working memory and attainment in English, mathematics and science. Implications of the findings for the theoretical analysis of executive functioning, working memory and children's learning are discussed.     

Participant recruitment methods and statistical reasoning performance

Optimal Bayesian reasoning performance has reportedly been elusive, and a variety of explanations have been suggested for this situation. In a series of experiments, it is demonstrated that these difficulties with replication can be accounted for by differences in participant-sampling methodologies. Specifically, the best performances are obtained with students from top-tier, national universities who were paid for their participation. Performance drops significantly as these conditions are altered regarding inducements (e.g., using unpaid participants) or participant source (e.g., using participants from a second-tier, regional university). Honours-programme undergraduates do better than regular undergraduates within the same university, paid participation creates superior performance, and top-tier university students do better than students from lower ranked universities. Pictorial representations (supplementing problem text) usually have a slight facilitative effect across these participant manipulations. These results indicate that studies should take account of these methodological details and focus more on relative levels of performance rather than absolute performance.     

A Brief Scale for Measuring “Behavioral Inhibition to the Unfamiliar” in Children

The behavioral inhibition scale (BIS) is a brief rating scale for measuring behavioral inhibition in children. The present study examined the test–retest stability of the BIS in a sample of 7–12-year-olds consisting of inhibited and non-inhibited children (N = 83). Results demonstrated that the BIS scores were fairly stable over a 2-year period, with a test–retest correlation of .77. Further, the BIS scores of inhibited children significantly increased over the 2-year period, whereas those of the non-inhibited comparison group significantly decreased. Finally, the BIS was in a theoretically meaningful way associated with temperamental traits as measured by the Rothbart scales. Altogether, these results provide support for the reliability and validity of the BIS.     

BENCHMARKS AFFECT PERCEPTIONS OF PRIOR DISABILITY IN A STRUCTURED INTERVIEW

Though covered under the Americans with Disabilities Act of 1990, job candidates with a record of a disability may be adversely evaluated. Two experiments demonstrate that subtle knowledge of a prior disability creates a bias that can be removed by a structured interview. A job candidate was labeled as having once suffered from depression, substance abuse, cancer, or no disability. The candidate who once suffered from depression or substance abuse was judged more negatively than a control candidate, while a cancer survivor was not. Though disabilities are not perceived equally, benchmarked rating scales can enhance attention to relevant behaviors, thus controlling the potential for bias.We thank Steven Gregson, Michael Records and Cynthia Strickland for their help with pilot studies. Shawn Bocketti is now with IBM, Stephen Maser is with Linkage Incorporated, and Craig Wennet is with the United States Coast Guard.