Differential effects of environmental enrichment on the open-field behavior of wild and domestic Norway rats.

Early postweaning experience in an enriched environment had a greater influence on the open-field behavior and body weight of wild Norway rats than of their domestic counterparts. Genetic changes accompanying the domestication process may have reduced the relative impact of postweaning experience on the development of the domestic rat's response to changes in its environment.     

Separating Implicit Gender Stereotypes regarding Math and Language: Implicit Ability Stereotypes are Self-serving for Boys and Men, but not for Girls and Women

We investigated implicit gender stereotypes related to math and language separately, using Go/No-go Association Tasks. Samples were grade 9 adolescents (N?=?187) and university students (N?=?189) in Germany. Research questions concerned the existence of and gender differences in implicit stereotypes. While typical explicit-stereotyping findings were replicated, implicit math-male stereotypes were found in male, but not in female participants. Females revealed strong language-female stereotypes, whereas males showed language-male counterstereotypes. Thus, females?? implicit math-gender stereotypes were the only ones that did not link own gender to the respective academic domain in a self-serving way. Further, females?? stronger stereotypes were related to lower and males?? to higher scores on constructs related to math ability, corroborating implicit stereotypes?? importance.     

Social reasoning about ‘second‐shift’ parenting

The present study investigated children's and adolescents’ social reasoning about parenting roles in the home, specifically ‘second‐shift parenting’ by a mother or father. Surveys were administered to children (age 10) and adolescents (age 13), nearly evenly divided by gender (N= 200) in which two hypothetical scenarios were evaluated. Participants were asked to evaluate and justify second‐shift parenting arrangements for the family overall, for the parent in the role, and for the child in the family. Results showed that participants expected mothers rather than fathers to take on the second‐shift role, and second‐shift parenting was evaluated as more unfair for fathers than for mothers. Personal choice reasoning was used for justifying arrangements for the second‐shift parent and moral reasoning was used for justifying arrangements for the child. Social reasoning about the context of parental caretaking roles was multifaceted and varied by age and gender of participant more so than by self‐reported personal family arrangements.     

The impact of task-irrelevant emotional stimuli on attention in three domains

Whether task-irrelevant emotional stimuli facilitate or disrupt attention performance may depend on a range of factors, such as emotion type, task difficulty, and stimulus duration. Few studies, however, have systematically examined the influence of these factors on attention performance. Sixty-three adults, scoring within a normative range for mood and anxiety symptoms, completed either an easy or difficult version of an attention task measuring three aspects of attention performance: alerting, orienting, and executive attention. Results showed that in the easy task only, threatening versus nonthreatening task-irrelevant emotional faces facilitated orienting regardless of stimulus duration. These effects were no longer significant during the difficult condition. When the easy and difficult conditions were examined together, duration effects emerged such that stimuli of longer durations lead to greater interference, although effects were nonlinear. Findings illustrate that threat-relevant emotional stimuli facilitate attention during tasks with low cognitive load, but underscore the importance of considering a range of task parameters. Results are discussed in the context of adaptive and maladaptive emotion-attention interactions.     

ASPECT-SWITCHING AND VISUAL PHENOMENAL CHARACTER

John Searle and Susanna Siegel have argued that cases of aspect-switching show that visual experience represents a richer range of properties than colours, shapes, positions and sizes. I respond that cases of aspect-switching can be explained without holding that visual experience represents rich properties. I also argue that even if Searle and Siegel are right, and aspect-switching does require visual experience to represent rich properties, there is reason to think those properties do not include natural-kind properties, such as being a tomato.