Hippocampal alpha 5 subunit-containing GABA A receptors are involved in the development of the latent inhibition effect

Hippocampal GABA(A) receptors containing the alpha 5 subunit have been implicated in the modulation of hippocampal-dependent learning, presumably via their tonic inhibitory influence on hippocampal glutamatergic activity. Here, we examined the expression of latent inhibition (LI)--a form of selective learning that is sensitive to a number of manipulations targeted at the hippocampal formation, in alpha 5(H105R) mutant mice with reduced levels of hippocampal alpha 5-containing GABA(A) receptors. A single pre-exposure to the taste conditioned stimulus (CS) prior to the pairing of the same CS with LiCl-induced nausea was effective in reducing the conditioned aversion against the taste CS in wild-type mice--thus constituting the LI effect. LI was however distinctly absent in male alpha 5(H105R) mutant mice. Hence, a partial loss of hippocampal alpha 5 GABA(A) receptors is sufficient to alter one major form of selective learning, albeit this was not seen in the female. This observed phenotype suggests that specific activation of these extrasynaptic GABA(A) receptors may confer therapeutic potential against the failure to show selectivity in learning by human psychotic patients.     

Age,Emotion Regulation Strategies,Temperament, Creative Drama,and Preschoolers' Creativity

Based on Yeh's (2004) Ecological Systems Model of Creativity Development, this study investigated the effects that age, the use of emotion regulation strategies, temperament, and exposure to creative drama instruction have on the development of creativity among preschool children. Participants were 1164‐ to 6‐year‐old preschool children. This study categorized the emotion regulation strategies used by preschool children and developed a creativity test which includes the measurement of usefulness, an indicator of creativity that has, until now, been ignored. The main findings are that (a) 6‐year‐olds outperform 4‐ and 5‐year‐olds in terms of creativity; (b) emotion regulation strategies as well as a positive temperament have positive effects on children's creativity; (c) creative drama instruction contributes to children's creativity; and (d) age group, emotion regulation strategies, temperament, and creative drama instruction can collectively predict children's creativity.     

Distributive Justice for Others,Collective Angst,and Support for Exclusion of Immigrants

Harsh treatment of others can reflect an underlying motivation to view the world as fair and just and also a dispositional tendency to believe in justice. However, there is a critical need to refine and expand existing knowledge, not only to identify underlying psychological processes but also to better understand how justice may be implicated in support for exclusionary policies. Across two studies, we show that support for policies that restrict immigrants is exclusively associated with thoughts about fair outcomes for other people (distributive justice for others). In Study 1, Americans' dispositional tendency to believe in distributive justice for others was associated with greater support for a policy proposing to further restrict immigrant job seekers' capacity to gain employment in the United States. In Study 2, we experimentally primed thoughts about justice in a sample of U.S. police officers. Support for a policy that mandated stricter policing of illegal immigration was strongest among officers who first thought about fair outcomes for other people, relative to other unique justice primes. Across both studies, distributive justice for others was associated with greater collective angst—perceived threat towards the future existence of Americans. Moreover, collective angst mediated the link between distributive justice for others and support for restrictive policies. Overall, this research suggests that thoughts about distributive justice for others can especially diminish compassion towards immigrants and other underprivileged groups via support for exclusionary policies. In addition, merely thinking about distributive justice for others may be sufficient to amplify social callousness.     

An investigation of verbal interaction, knowledge of sexual behavior and self-concept in adolescent mothers

Variables commonly considered to be major factors in contributing to the incidence of adolescent pregnancy may be only part of the total pattern. This study sought to examine the adolescent mothers' communication with significant others and their knowledge about sex, pregnancy, and birth control methods. Self-concepts of the adolescent mothers were compared with those of the published norms of the Tennessee Self-Concept Scale. The study included 23 adolescent mothers between the ages of 13 and 19 who were gravida 1 as indicated by their medical records. They were given a questionnaire constructed from previous research. They also completed a communication scale and the Tennessee Self-Concept Scale. The findings of the present study indicated that most adolescent mothers considered their communication with their parent mothers to be one of mutual understanding. However, it appears that most adolescent mothers obtain much of their information about sex, pregnancy, and birth control methods from significant others. The self-concepts of these adolescent mothers were lower in comparison to the norm. The results indicate a need for further research in the area of adolescent sexual development, sex education in the school, and increased involvement of parents in the communication of sexual mores.     

The relationship between creativity and psychosis-proneness

One-hundred and fifteen undergraduates were repeatedly administered a battery measuring schizotypal personality type and creativity (remote associations). Principal Components Analysis found a two-factor model to be most parsimonious. The pattern of results suggests that magical ideation and perceptual aberration items are represented by one factor and suspiciousness by the second. Analysis of consistent versus inconsistent high scorers on the schizoptypia measure indicated that inconsistent high scorers on the suspiciousness factor scored significantly higher than consistent high scorers on the creativity measure.     

Relationship between Psychological Needs and the Five-Factor Model of Personality Classification

The relationship between psychological needs, operationalized by the Adjective Check List (ACL), and the Five-Factor model of personality classification, operationalized by the NEO-PI-R, was evaluated in 147 (101 women and 46 men) psychology graduate students. We found presence of the Five Factors in the ACL in that 30 of 37 ACL scales correlated greater than 40 with at least one of the NEO-PI-R factors. This replicates and extends previous findings and is further evidence of construct validity of the five-factor model, as it pertains to personality classification.     

The self-reference effect: Methodological issues and implications from a schema-theoretical perspective

A number of investigators demonstrated that processing verbal stimuli by encoding them in reference to the self facilitates recall for these stimuli, compared with other kinds of semantic processing. On the basis of a critical discussion of the relevant research, it is hypothesized that the superiority of self-reference is due to some specific features of semantic orienting tasks that serve as control groups for self-referent encoding. This hypothesis is tested in three experiments demonstrating that, when changing certain features of these semantic orienting tasks, the self-reference-effect (SRE) is no longer obtained. In Experiment 3, the statistical difficulties are addressed that arise when not rejecting the null-hypothesis. Furthermore, several implications of schema-oriented explanations of the SRE are tested. Several dependent measures provide evidence in support of the motion that a self-schema is activated during encoding and retrieval of self-relevant material. However, results show that self-referent processing — in contrast to the most general claim of the relevant literature—does not lead to superior recollection.     

Mothers as a Resource in Times of Stress: Interactive Contributions of Socialization of Coping and Stress to Youth Psychopathology

This study examined the hypothesis that maternal socialization of coping would make a differential contribution to youth depression and externalizing psychopathology depending on youths’ level of exposure to life stress. A sample of 155 youth (M age = 12.41, SD = 1.21) and their maternal caregivers completed semi-structured interviews and questionnaires in a two-wave longitudinal study over a 1-year period. Results provided evidence for two types of socialization × stress interactions—an amplification-effects model and a differential-effects model. In the context of interpersonal stress, findings supported an amplification-effects model wherein the risk and protective effects of engagement and disengagement socialization of coping emerged in youth exposed to high but not mild levels of stress. In the context of noninterpersonal stress, findings supported a differential-effects model wherein disengagement socialization of coping contributed to heightened risk among youth exposed to high stress but dampened risk among youth exposed to mild stress. This research identifies maternal socialization of coping as a noteworthy contributor to risk for youth psychopathology, and highlights the need to consider parenting × environment interactions when investigating parenting processes related to youth psychopathology.