Life-long environmental enrichment differentially affects the mnemonic response to estrogen in young, middle-aged, and aged female mice

The present study was designed to examine whether life-long exposure to standard or enriched housing affects the ability of estrogen to improve spatial and object memory throughout the lifespan. Three-week-old female mice were maintained in standard or enriched housing up to and through ovariectomy and behavioral testing at 5, 17, or 22 months of age. Spatial memory was tested in the Morris water maze and object memory was tested using an object recognition task. Immediately after training each day, mice were injected intraperitoneally with vehicle or 0.2 mg/kg 17beta-estradiol. Among young females, object recognition was enhanced by estradiol alone, an effect that was reduced by enrichment. In contrast, spatial water maze performance was impaired by estradiol alone, but improved by the combination of both estradiol and enrichment. At middle-age, object recognition was enhanced by estradiol or enrichment alone, and the combination of both treatments. Spatial memory in the water maze was also improved by both treatments at middle-age, but the beneficial effects of estradiol were limited to standard-housed females. Finally, whereas enrichment in aged females significantly enhanced performance in both tasks, estradiol had no effect at this age in either task. In total, the data indicate that life-long enrichment can significantly alter the extent to which estradiol affects memory in mice throughout the lifespan. Importantly, the interaction between these treatments is highly dependent on age and type of memory tested.     

Unexpected improvement, decline, and stasis: a prediction confidence perspective on achievement success and failure

The authors hypothesized that reactions to performance feedback depend on whether one's lay theory of intelligence is supported or violated. In Study 1, following improvement feedback, all participants generally exhibited positive affect, but entity theorists (who believe that intelligence is fixed) displayed more anxiety and more effort to restore prediction confidence than did incremental theorists (who believe that intelligence is malleable). Similarly, when performance declined, entity theorists displayed more anxiety and compensatory effort than incremental theorists. However, when performance remained rigidly static despite a learning opportunity, incremental theorists evinced more anxiety and compensatory effort than entity theorists. In Study 2, this pattern was replicated when the entity and incremental theories were experimentally manipulated. Study 3 demonstrated that for both groups, theory violation impairs subsequent task performance. Taken together, these studies provide evidence that lay theory violation and damaged prediction confidence have significant and measurable effects on emotion and motivation. The authors discuss the implications of these findings for the literature on achievement success and failure.     

Division of Household Labor and Distress: The Role of Perceived Fairness for Employed Mothers

This study used a sample of 121 employed, married (or cohabitating) mothers with a high socioeconomic status (SES) primarily from the Midwest United States to examine the relationship between division of household labor, perceived fairness, and distress. Due to inconsistent findings in prior literature, perceived fairness was examined as both a mediator and moderator between division of household labor and distress. Analyses indicated that perceived fairness played a mediating (but not moderating) role, suggesting that an individual’s perceptions of fairness are one mechanism by which division of household labor influences marital and personal distress in married individuals. Post hoc analyses also indicated that increased marital distress may explain the link between perceived unfairness and personal distress. Although results must be interpreted with caution due to the selectivity of the sample, the present study provides additional support for the importance of perceived fairness in the link between division of household labor and distress.     

Stressed out over possible failure: The role of regulatory fit on claimed self-handicapping

The self-protective mechanism of self-handicapping appears to be motivated by the need to protect ability attributions in the face of concern about possible failure. Indeed, the present research finds a correlation between trait self-handicapping and chronic prevention focus. Moreover, the present research examines the role of “regulatory fit” on the use of claimed self-handicapping by exposing high and low trait self-handicappers to performance situations framed in prevention or promotion terms. Consistent with our regulatory fit hypothesis, high self-handicappers (HSHs) handicapped significantly more (by reporting higher levels of stress) when the task was framed in prevention focus rather than promotion focus terms, and did so even when the viability of the handicap was dubious. Self-handicapping in the prevention focus condition was mediated by elevated feelings of evaluative concern. The findings suggest that conditions of regulatory fit (i.e., HSHs under prevention focus) can lead to increased use of self-handicapping.     

Should I Confront Him? Men’s Reactions to Hypothetical Confrontations of Peer Sexual Harassment

This study investigated how men react to a hypothetical confrontation by a woman of a male sexual harasser. Participants were 250 male undergraduates from a Canadian university who read scenarios depicting sexual harassment that varied by type of harassment and style of confrontation. Findings suggest that men have more negative feelings and opinions of a female confronter, and would engage in more negative verbal behaviour if confronted about subtle versus overt harassment. Contrary to prediction, assertive/hostile confrontation styles were related to only limited negative reactions. Although this study found that men’s reported reactions were not markedly negative, we discuss the importance of these results for women in understanding what factors may increase the chance that men will react negatively.     

Infants use shared experience to interpret pointing gestures

We investigated whether 1‐year‐old infants use their shared experience with an adult to determine the meaning of a pointing gesture. In the first study, after two adults had each shared a different activity with the infant, one of the adults pointed to a target object. Eighteen‐ but not 14‐month‐olds responded appropriately to the pointing gesture based on the particular activity they had previously shared with that particular adult. In the second study, 14‐month‐olds were successful in a simpler procedure in which the pointing adult either had or had not shared a relevant activity with the infant prior to the pointing. Infants just beginning to learn language thus already show a complex understanding of the pragmatics of cooperative communication in which shared experience with particular individuals plays a crucial role.     

Concurrent associations between anxiety sensitivity and perceived health and health disability among young adult daily smokers

The aim of this investigation was to evaluate the incremental validity of anxiety sensitivity (fear of arousal-related physical and psychological sensations) relative to health factors (smoking variables, alcohol use and exercise level), in predicting perceived health and disability among a sample of 225 young adult daily smokers (102 females; M(age) = 23.9 years, SD = 8.8). Consistent with prediction, anxiety sensitivity, relative to smoking-relevant variables, alcohol consumption (a single frequency by quantity composite) and exercise activity, predicted lower perceived general health and impairments in mental health and social functioning; no incremental effects were evident for anxiety sensitivity for predicting impairments in physical functioning, role functioning, or increased healthcare usage. These findings are discussed with respect to better understanding cognitive factors that affect perceptions of health status and functioning among daily smokers.     

Word lists for testing cognitive biases toward body shape among men and women

The present study developed word lists describing three categories of body build—fat, thin, and muscular— for use in investigating cognitive risk factors for body dissatisfaction. Fifty-one men and 51 women rated the categorization, valence, and familiarity of 284 body-related adjectives in order to develop the final lists. The normative frequency of each of the 284 words was determined using an index of American English. The final 19- to 26-item word lists were constructed so that the average number of syllables, word length, word frequency, and mean percentage of categorization agreement were comparable. The availability of these word lists will facilitate future cognitive research into a key risk factor for eating disorders.     

Racial attitudes in response to thoughts of white privilege

Thinking about the benefits gained from a privileged group membership can threaten social identity and evoke justification of the existing status difference between the ingroup and a disadvantaged group. For White Americans, racial privilege may be justified by concurring with modern racist attitudes. In Experiment 1, White Americans randomly assigned to think about White privilege expressed greater modern racism compared to those assigned to think about White disadvantage or a race‐irrelevant topic. In Experiment 2, we found that increased racism in response to thoughts of White privilege was limited to those who highly identified with their racial category. In contrast, when White racial identification was sufficiently low, thoughts of White privilege reliably reduced modern racism. We discuss the implications of these findings for the meaning of modern racism and prejudice reduction. Copyright © 2006 John Wiley & Sons, Ltd.