Greater Intermanual Transfer in the Elderly Suggests Age-Related Bilateral Motor Cortex Activation Is Compensatory

ABSTRACT. Hemispheric lateralization of movement control diminishes with age; whether this is compensatory or maladaptive is debated. The authors hypothesized that if compensatory, bilateral activation would lead to greater intermanual transfer in older subjects learning tasks that activate the cortex unilaterally in young adults. They studied 10 young and 14 older subjects, learning a unimanual visuomotor task comprising a feedforward phase, where there is unilateral cortical activation in young adults, and a feedback phase, which activates the cortex bilaterally in both age groups. Increased intermanual transfer was demonstrated in older subjects during feedforward learning, with no difference between groups during feedback learning. This finding is consistent with bilateral cortical activation being compensatory to maintain performance despite declining computational efficiency in neural networks.     

Motor excitability during movement preparation in Tourette syndrome

Tourette syndrome (TS) is a neurodevelopmental disorder characterized by the occurrence of motor and vocal tics. TS has been linked to the impaired operation of cortical‐striatal‐thalamic‐cortical circuits that give rise to hyper‐excitability of cortical motor areas, which may be exacerbated by dysfunctional intra‐cortical inhibitory mechanisms. That said, many individuals gain control over their tics during adolescence and it has been suggested that this increased control arises as a result of the development of mechanisms that operate to suppress corticospinal excitability (CSE) ahead of volitional movements. Here we used single‐pulse transcranial magnetic stimulation (TMS) in conjunction with a manual Go/NoGo task to investigate alterations in CSE ahead of volitional movements in a group of adolescents with TS (N = 10). Our study demonstrated that CSE, as measured by TMS‐induced motor‐evoked potentials (MEPs), was significantly reduced in the TS group in the period immediately preceding a finger movement. More specifically, we show that individuals with TS, unlike their age‐matched controls, do not exhibit the predicted increase in mean MEP amplitude and decrease in MEP variability that immediately precede the execution of volitional movements in typically developing young adults. Finally, we report that the magnitude of the rise in MEP amplitude across the movement preparation period in TS is significantly negatively correlated with clinical measures of motor tic severity, suggesting that individuals with severe motor tics are least able to modulate motor cortical excitability.     

Matching Abilities to Careers for Others and Self: Do Gender Stereotypes Matter to Students in Advanced Math and Science Classes?

Interest in STEM (science, technology, engineering, and mathematics) careers falls off more quickly for young women than for young men over adolescence, and gender stereotypes may be partially to blame. Adolescents typically become more stereotypical in their career interests over time, yet they seem to become more flexible in applying stereotypes to others. Models of career interest propose that career decisions result from the alignment of self-perceived abilities with occupation-required skills and that gender stereotypes may influence this process. To investigate the discrepancy between applying stereotypes to self and others, we examined if these models can be applied to perceptions of others. Focusing on students from fifth grade through college enrolled in advanced STEM courses, we investigated how STEM occupational stereotypes, abilities, and efficacy affect expectations for others’ and own career interests. U.S. participants (n = 526) read vignettes describing a hypothetical male or female student who was talented in math/science or language arts/social studies and then rated the student’s interest in occupations requiring some of those academic skills. Participants’ self-efficacy, interest, and stereotypes for STEM occupations were also assessed. Findings suggest that ability beliefs, whether for oneself or another, are powerful predictors of occupational interest, and gender stereotypes play a secondary role. College students were more stereotypical in their ratings of others, but they did not manifest gender differences in their own STEM self-efficacy and occupational interests. Experiences in specialized STEM courses may explain why stereotypes are applied differentially to the self and others.     

Children’s Maternal Representations Moderate the Efficacy of Parent–Child Interaction Therapy—Emotion Development (PCIT-ED) Treatment For Preschool Depression

Research on Child and Adolescent Psychopathology - A randomized controlled trial (RCT) demonstrated that a novel psychotherapy, Parent–Child Interaction Therapy—Emotion Development...     

The flexible nature of everyday reciprocity: reciprocity,helping, and relationship closeness

Motivation and Emotion - Past research on gratitude assumes that norms of reciprocity are incompatible with personal relationships as they are based on the rigid normative expectations...     

Addictive personality traits in bulimic patients

Forty-five female patients attending for treatment for bulimia nervosa completed the EPQ and an Impulsiveness Inventory (I₇). An Addiction score, derived from items on the EPQ, was obtained confirming that this group of bulimic patients score almost as high as drug addicts and certainly well above the normal range. On individual personality scales, the bulimic Ss scored higher than normals on N, P, Imp and Emp, but lower on E, Vent and Social Desirability.     

The elusive pragmatic reasoning schemas effect

The present study examined the pragmatic reasoning schema theory of deductive reasoning—specifically, its explanation of performance on the selection task. Experiment 1 replicated a result crucial to the theory, the finding of facilitation on abstract versions of the selection task based on pragmatic reasoning schemas. However, Experiments 2, 3, and 4 established that this facilitation was dependent upon two presentation factors: (1) the presence of explicit negatives on the NOT P and NOT Q cards and (2) the inclusion of a checking context in the problem statement. These results are discussed in terms of Evans's two-stage (heuristic/analytic processing) model of reasoning.