Attention deficit hyperactivity disorder among inmates in Bergen Prison

The aim of this study was to investigate whether clinical findings are consistent with research indicating a high prevalence of attention deficit hyperactivity disorder (ADHD) among prison inmates. Forty‐three male inmates who were referred for ADHD assessment at the health service in Bergen prison participated. Although most of them reported symptoms in accordance with ADHD both in childhood and adulthood, only 35% of the referred inmates fulfilled the criteria for ADHD when a comprehensive assessment was conducted. The results emphasize the importance of a comprehensive assessment when diagnosing ADHD among prison inmates.     

Children's appraisals of sex-typed behavior in their peers

Four experiments evaluated the effect of variations in sex-typed behavior in hypothetical peers on children's ratings of friendship. In all four studies, the children were heterogeneous with regard to social class, ethnicity, and race. In Experiment 1, children (71 boys, 90 girls) in Grades 3–6 read five stories about a target boy and in Experiment 2 (102 boys, 137 girls) about a target girl who displayed four sex-typed behaviors that ranged from exclusively masculine to exclusively feminine. In Experiment 1, boys preferred the exclusively masculine boy most as a friend. With each addition of a feminine behavior (and corresponding subtraction of a masculine behavior), the friendship ratings became increasingly negative. In contrast, the girls preferred the exclusively feminine boy most as a friend and, with each addition of a masculine behavior, the friendship ratings became increasingly negative. In Experiment 2, the converse was found although girls' ratings of friendship were less sharply affected by the target girl's sex-typed behavior than was observed for boys' ratings in Experiment 1. In Experiment 3, children (33 boys, 38 girls) in Grades K—2 were read three stories about a target boy, accompanied by detailed chromatic illustrations, whose four sex-typed behaviors were exclusively masculine, equally masculine and feminine, or exclusively feminine. The boys had significantly more favorable friendship ratings than the girls; however, in contrast to Experiments 1 and 2, the target boy's sex-typed behavior did not affect friendship ratings of either boys or girls. Experiment 4 (28 boys, 27 girls) repeated the procedure of Experiment 3 with children in kindergarten and Grade 1; in addition, the children made forced-choice friendship ratings for each of the three possible story pairs. In contrast to Experiment 3, boys' friendship ratings were affected by the target boy's sex-typed behavior, as observed in Experiment 1, but girls' friendship ratings were not. However, in the forced-choice situation, the boys significantly preferred the exclusively masculine boy whereas the girls significantly preferred the exclusively feminine boy. The results were discussed in relation to the influence sex-typed behavior has on modifying the effects of a peer's sex on affiliative preference and sex differences in appraisals of cross-gender behavior, including the concept of threshold effects.     

Individual Differences in Social Dominance Orientation Predict Support for the Use of Cognitive Ability Tests

This study investigates the personality processes involved in the debate surrounding the use of cognitive ability tests in college admissions. In Study 1, 108 undergraduates (M_age = 18.88 years, 60 women, 80 Whites) completed measures of social dominance orientation (SDO), testing self‐efficacy, and attitudes regarding the use of cognitive ability tests in college admissions; SAT/ACT scores were collected from the registrar. Sixty‐seven undergraduates (M_age = 19.06 years, 39 women, 49 Whites) completed the same measures in Study 2, along with measures of endorsement of commonly presented arguments about test use. In Study 3, 321 American adults (M_age = 35.58 years, 180 women, 251 Whites) completed the same measures used in Study 2; half were provided with facts about race and validity issues surrounding cognitive ability tests. Individual differences in SDO significantly predicted support for the use of cognitive ability tests in all samples, after controlling for SAT/ACT scores and test self‐efficacy and also among participants who read facts about cognitive ability tests. Moreover, arguments for and against test use mediated this effect. The present study sheds new light on an old debate by demonstrating that individual differences in beliefs about hierarchy play a key role in attitudes toward cognitive ability test use.     

Linking vitamin D status,executive functioning and self‐perceived mental health in adolescents through multivariate analysis: A randomized double‐blind placebo control trial

The aim of the present randomized double‐blind placebo control trial was to investigate if vitamin D supplementation had an effect on vitamin D status, executive functioning and self‐perceived mental health in a group of Norwegian adolescents during winter time. Fifty adolescents were randomly assigned into an intervention group (vitamin D pearls) or a control group (placebo pearls). Before (pre‐test in December/January) and after (post‐test in April/May) the intervention period the participants were exposed to a test procedure, consisting of blood draw, completion of cognitive tests (Tower of Hanoi and Tower of London), and the Youth Self‐report version of the Child Behavior Checklist. Multivariate data analysis showed that participants with low vitamin D status scored worse on the Tower of London tests and the more difficult sub‐tasks on the Tower of Hanoi tests. They also had a tendency to report higher frequency of externalizing behavior problems and attention deficit. At pre‐test, the overall mean vitamin D status measured as 25‐hydroxy vitamin D was 42 nmol/L, defining deficiency (Intervention group = 44 nmol/L, Control group = 39 nmol/L). However, vitamin D supplementation caused a significant increase in vitamin D status resulting in a sufficient level in the Intervention group at post‐test (mean 62 nmol/L). The results also revealed that the intervention group improved their performance on the most demanding sub‐tasks on the ToH. Overall, the study indicates that vitamin D status in adolescents may be important for both executive functioning and mental health.