The Chronotype-Academic Performance Model (CAM): Daytime sleepiness and learning motivation link chronotype and school performance in adolescents

Many adolescents experience a discrepancy between their biological time, which is shifted toward eveningness, and early school starting times. Due to this social jetlag, eveningness is negatively correlated with school performance. On the basis of the here presented data, we derived a model for the association of chronotype and school performance, the Chronotype-Academic Performance Model (CAM), including daytime sleepiness and achievement motivation as mediating factors. The sample comprised N = 273 adolescents aged 14–16 years. Circadian preference, daytime sleepiness, learning and achievement motivation, and information about participants’ last school certificate were assessed online. Chronotype was not directly related to academic performance, but was mediated by daytime sleepiness and learning motivation. Morning-orientation was negatively associated with daytime sleepiness and positively with learning motivation, which, in turn, affected performance. In evening-types, we found the strongest association between sleepiness and refusal to work. The CAM suggests that chronotype may not directly influence academic performance, but be mediated by daytime sleepiness and learning motivation. Evening types seem to be at high risk to suffer from daytime sleepiness and to display dysfunctional attitudes toward work. Measures of reducing sleepiness and modifying attitudes toward academic achievement might attenuate the disadvantages of evening-types due to social jetlag.     

Information processing and speech lateralization in learning-disabled children

The relationship between information processing and speech lateralization was investigated in learning-disabled children. The Kaufman Assessment Battery for Children (K-ABC) assessed simultaneous and successive processing while a dichotic listening paradigm with free recall and directed attention conditions assessed speech lateralization. A three-factor ANOVA design conducted on the dichotic data revealed that normal children demonstrated stronger right ear advantage (REA); whereas learning-disabled showed weaker right ear advantage. Further, lambda analyses conducted on individual subjects revealed that the learning-disabled did not demonstrate the REA, were not biased attenders, and did not get more right ear than left ear items when attention was directed to one ear. Multiple-regression analysis was used to predict sequential processing from the dichotic data for both groups. Learning-disabled children demonstrated a substantial deficit in sequential processing as compared to normal children. These results indicate that learning-disabled children may not have adequate cerebral lateralization of receptive speech processes, shift their attention more readily, and are more inadequate in sequential processing that presumably subserves language functioning. Perhaps learning-disabled children have deficiencies of processor capacity of salient areas of the left (language) hemisphere.     

Problems for Linguistic Solutions to the Paradox of Analysis

G. E. Moore opined that the paradox of analysis might be avoided if it could be shown that sentences expressing conceptual analyses convey information not only about concepts, but also about the expressions they use. If so, "to be a brother is to be a male sibling" and "to be a brother is to be a brother" might express the same proposition, and yet not be identical in information value as the paradox suggests. How sentences might do this, Moore could not see. Many philosophers have pointed out an obvious way in which sentences might be said to convey information about the expressions they use. Some have suggested this information might be used to develop Moore's intuition and resolve the paradox of analysis. I argue that this approach fails. I present a version of the paradox of analysis that resists this sort of solution.     

Women's self-estimates of competence and the resolution of the career/home conflict

Relationships among women's role factors, self-estimates of competence, and career commitment were investigated. Eighty female business students and 111 business alumnae completed the Attitudes Toward Women Scale, the Performance-Self-Esteem Scale (PSES), and questions regarding home and career choices. As predicted, PSES scores were related to extent of career commitment, and PSES scores mediated the relationship between career commitment and women's role factors. Among high PSES subjects, career commitment was positively related to nontraditional sex-role attitudes and negatively related to family involvement. Among low PSES subjects, the relationship between career commitment and women's role factors was weaker. Implications for women's career development are discussed.     

E‐Mailed Standardized Cognitive Behavioural Treatment of Work‐Related Stress: A Randomized Controlled Trial

The aim of this study was to assess the effects of a 7‐week standardized cognitive behavioural treatment of work‐related stress conducted via e‐mail. A total of 342 people applied for treatment in reaction to a newspaper article. Initial screening reduced the sample to a heterogeneous (sub)clinical group of 239 participants. Participants were assigned randomly to a waiting list condition (n = 62), or to immediate treatment (n = 177). A follow‐up was conducted 3 years after inception of the treatment. The outcome measures used were the Depression Anxiety Stress Scales (DASS‐42) and the Emotional Exhaustion scale of the Maslach Burnout Inventory – General Survey (MBI‐GS). Fifty participants (21%) dropped out. Both groups showed statistically significant improvements. Intention‐to‐treat analysis of covariance (ANCOVAs) revealed that participants in the treatment condition improved significantly more than those in the waiting control condition (0.001<p?0.025). In the treatment group, the effects were large to moderate (0.9 (stress)?d?0.5 (anxiety)). The between‐group effects ranged from d = 0.6 (stress) to d = 0.1 (anxiety). At follow‐up, the effects were more pronounced, but this result requires replication in view of high attrition at follow‐up. The results warrant further research on Internet‐driven standardized cognitive behavioural therapy for work‐related stress. Such research should include the direct comparison of this treatment with face‐to‐face treatment, and should address the optimal level of therapist contact in Internet‐driven treatment.     

Writing hand posture and four indexes of lateral preference

The relationship between writing hand posture and lateral preference for hand, foot, eye, and ear was examined in a sample of 3709 college undergraduates. A markedly different pattern of lateral preferences was observed in left-handed males and females as a function of hand posture. Left-handed male inverters displayed a tendency toward more leftward lateral preferences in all four indexes; while it was found that hand inversion during writing in left-handed females reflected, if anything, a tendency toward more rightward lateral preferences.