Does adolescent risk taking imply weak executive function? A prospective study of relations between working memory performance,impulsivity, and risk taking in early adolescence

Studies of brain development suggest that the increase in risk taking observed during adolescence may be due to insufficient prefrontal executive function compared to a more rapidly developing subcortical motivation system. We examined executive function as assessed by working memory ability in a community sample of youth (n = 387, ages 10 to 12 at baseline) in three annual assessments to determine its relation to two forms of impulsivity (sensation seeking and acting without thinking) and a wide range of risk and externalizing behavior. Using structural equation modeling, we tested a model in which differential activation of the dorsal and ventral striatum produces imbalance in the function of these brain regions. For youth high in sensation seeking, both regions were predicted to develop with age. However, for youth high in the tendency to act without thinking, the ventral striatum was expected to dominate. The model predicted that working memory ability would exhibit (1) early weakness in youth high in acting without thinking but (2) growing strength in those high in sensation seeking. In addition, it predicted that (3) acting without thinking would be more strongly related to risk and externalizing behavior than sensation seeking. Finally, it predicted that (4) controlling for acting without thinking, sensation seeking would predict later increases in risky and externalizing behavior. All four of these predictions were confirmed. The results indicate that the rise in sensation seeking that occurs during adolescence is not accompanied by a deficit in executive function and therefore requires different intervention strategies from those for youth whose impulsivity is characterized by early signs of acting without thinking.     

How do people evaluate social sexual conduct at work? A psycholegal model

The authors tested a psycholegal model of how people evaluate social sexual conduct at work with videotaped reenactments of interviews with alleged complainants, perpetrators, and other workers. Participants (200 full-time male and female workers) were randomly assigned to evaluate the complaints with either the reasonable person or reasonable woman legal standard. Participants answered questions about sexual harassment law and completed the Ambivalent Sexism Inventory. Participants who took the reasonable woman perspective, as compared with those who took the reasonable person perspective, were more likely to find the conduct harassing; this was especially the case among participants high in hostile sexism. Medium-sized gender effects were found in the severe case but were absent in the weaker, more ambiguous case. The implications of these findings for hostile work environment law are discussed.     

Work values in vocational interest exploration

Work values as an exploratory construct in vocational choice supplemental to inventoried and expressed vocational interest was examined using 42 ninth graders. Data on Kuder Preference Record-Vocational scores, expressed vocational interest, and work values were converted to comparable bases using Holland's environmental model. Analysis of regression comparing a full model using an three variables to a restricted model deleting work values established work values as a significant, independently explanatory variable [F(1,39) = 4.45, p < .05]. The demonstrated utility of work values coupled with the commonality of expressed and inventoried interest suggest using work values to facilitate decision making with the vocationally decided, omitting the use of interest inventories. Expanded multivariate research is needed to determine how best to combine work values and inventoried interest to guide undecided clients into satisfying vocational channels.     

Parenting,Family Loneliness,and Peer Functioning in Boys with Attention-Deficit/Hyperactivity Disorder

The goal of the present study was to consider the associations between family functioning (parenting and family loneliness) and peer functioning in a sample of boys with ADHD (N = 110) and their mothers (N = 108) and fathers (N = 53). Results indicated that higher paternal warmth was associated with more peer acceptance, less peer rejection, and less problematic social behavior, but only for boys who reported low levels of family loneliness. In addition, more paternal power assertion was related to less peer acceptance, but only for boys who reported low levels of family loneliness. Maternal warmth and power assertion were not significantly related to boys' peer functioning. We discuss these findings in the context of the processes by which parenting may affect the peer relationships of these children.     

Multimodal Treatments for Childhood Attention-deficit/Hyperactivity Disorder: Interpreting Outcomes in the Context of Study Designs

The goal of this article was to outline issues critical to evaluating the literature on incremental benefit of multiple effective treatments used together, vs. a single effective treatment, for childhood ADHD. These issues include: (1) sequencing and dosage of treatments being combined and compared; (2) difficulty drawing valid conclusions about individual components of treatment when treatment packages are employed; (3) differing results emerging from measurement tools that purportedly measure the same domain; and (4) the resultant difficulty in reaching a summary conclusion when multiple outcome measures yielding conflicting results are used. The implications of these issues for the design and conduct of future studies are discussed, and recommendations are made for future research.     

The Role of Declarative and Procedural Knowledge in Capital Murder Sentencing1

This paper identifies rational orderliness and moral appropriateness as 2 norms that the United States Constitution requires for sentencing in capital murder trials. The courts convey these norms directly to jurors through jury instructions in the penalty phase of capital murder trials. To follow the instructions, jurors require accurate declarative knowledge (rules of law) and procedural knowledge (processes required to execute the rules) of state and federal sentencing law. Undergraduate mock jurors showed low accuracy for both types of knowledge after reviewing and listening to pattern jury instructions. Participants failed to offset aggravating factors with mitigating circumstances as the Missouri Approved Jury Instructions direct. The less knowledge that participants mastered about mitigation, the more certain they were of invoking the death penalty.     

The Effect of Stress on Spontaneous Nest Leaving Behavior in the Mouse: An Improved Model of Stress-Induced Behavioral Pathology

The present experiments were conducted to develop a more sensitive and reliable model of stress-induced behavioral pathology in the mouse. Male mice were housed singly in nest cages connected to either a circular tunnel, a recreational cage or a large box with food foraging apparatus. Spontaneous nocturnal out of nest activity or food foraging behavior in these environments was continuously monitored for a two week period during which time the effects of stress were examined. It was found that both repeated restraint and aggression stress markedly and persistently reduced out of nest nocturnal activity or food foraging behavior in all 3 environments but did not alter activity in a novel open field or plus maze or food or saccharin intake in the nest cage. In a preliminary experiment the reduction in out of nest activity by stress was attenuated by prior chronic treatment with the antidepressant, desmethylimipramine. Plasma corticosterone was elevated immediately after aggression stress but reduced 5 hr after chronic aggression stress. The reduction in activity did not appear the result of increased anxiety as measured by spontaneous risk assessment behavior in the nest. It is concluded that the decrease in out of nest activity after stress in the present studies models a withdrawn behavioral state and may be due to either or both a decrease in appetitive motivation to leave the nest or an increased aversion to the external environment which does not apparently involve anxiety.     

Discriminant validity of the MMPI for borderline personality disorder

This study explores the discriminant validity of the MMPI in relationship to the DSM-III and the Diagnostic Interview for Borderlines (DIB) constructs of Borderline Personality Disorder (BPD). A two-way analysis of variance model assessed differences between inpatients (n = 42) and outpatients (n = 42) and between BPD and nonBPD patients. We compare the best discriminant model for the current samples with previous BPD discriminant functions. The present study assesses a wider range of psychopathology in which the MMPI appears to be relatively insensitive to the BPD construct while retaining the high specificity reported in previous studies. Implications for the use of the MMPI as a diagnostic instrument are discussed.