Sexual orientation and shifts in preferences for a partner's body attributes in short-term versus long-term mating contexts.

This study assessed the effects of short- and long-term mating contexts on preferences for body characteristics of potential relationship partners in lesbians and heterosexual women. Lesbians (n = 41) rated figure drawings and computer-generated images of women that varied in body fat, waist-to-hip ratio, and breast size; heterosexual women (n = 95) rated computer-generated images of men that varied in muscularity and body fat. Both lesbians and heterosexual women showed a shift in preferences toward more physically attractive partners for shortterm relationships. All body aspects were affected, except that heterosexual women did not show a preference shift for male body fat. The results were interpreted in terms of a mating trade-off strategy in which mate preferences are the consequence of cost/benefit analyses and suggest that preferences for physical attributes of sexual partners may be shared by members of the same sex regardless of sexual orientation.

Women and body dissatisfaction: Does sexual orientation make a difference?

In this study, heterosexual (n=95) and nonheterosexual (n=84) women were asked to rate figure drawings and computer-generated images of women that varied in body fat, waist-to-hip ratio, and breast size in terms of self, ideal, and cultural ideal; discrepancy indices, indicating body dissatisfaction, were created for each body aspect. Nonheterosexual women had significantly higher body mass indices (BMIs) than heterosexual women, but when the effects of BMI were controlled, participants evidenced similar perceptions of their bodies, their ideal bodies, and the female cultural ideal, as well as similar levels of body dissatisfaction for body fat, waist-to-hip ratio, and breast size. The results of this study suggest that being a member of a society that highly values a thin, curvaceous, relatively large-breasted body puts women, regardless of sexual orientation, at risk for body dissatisfaction.

Sleep debt and depression in female college students.

The objective of the study was to evaluate relationships between sleep habits and depressive symptoms. Pilot study data were collected about sleep schedules, related factors and depression in female college students to find whether their sleep schedules correlate with affective symptoms. In the subsequent main study, similar information was collected under more controlled conditions. Depression was measured using the CES-D (Center for Epidemiologic Studies Depression Scale) and HAM-D-3 (modified Hamilton Depression Rating Scale). Response rates were 31.3% of eligible students for the pilot survey and 71.6% for the main study. Both studies showed that about 20% of students reported weekday sleep debts of greater than 2 h and about 28% reported significantly greater sleep debt and had significantly higher depression scores (P<0.0001) than other students. Melancholic symptoms indicated by high CES-D scores (>24), were observed in 24% of students. Sleep problems explained 13% of the variance for both the CESD scale and the HAM-D-3 scale. Among female college students, those who report a sleep debt of at least 2 h or significant daytime sleepiness have a higher risk of reporting melancholic symptoms than others.

Pilot study of relationship between fertility risk and bargaining.

Competition for resources to support a healthy pregnancy and later offspring was likely very important for ancestral women. Therefore, it was predicted that women evolved a propensity for intrasexual competition over resources during times of their highest conception risk. To investigate this hypothesis, women played a series of ultimatum games, bargaining games that test participants' willingness to share a monetary stake. During periods of high conception risk, intrasexual competition increased as evidenced by lower offers to share a stake with others as well as higher rates of rejection of offers.

Inference of beliefs and emotions in patients with Alzheimer's disease.

The present study compared 20 patients with mild to moderate Alzheimer's disease with 20 older controls (ages 69-94 years) on their ability to make inferences about emotions and beliefs in others. Six tasks tested their ability to make 1st-order and 2nd-order inferences as well as to offer explanations and moral evaluations of human action by appeal to emotions and beliefs. Results showed that the ability to infer emotions and beliefs in 1st-order tasks remains largely intact in patients with mild to moderate Alzheimer's. Patients were able to use mental states in the prediction, explanation, and moral evaluation of behavior. Impairment on 2nd-order tasks involving inference of mental states was equivalent to impairment on control tasks, suggesting that patients' difficulty is secondary to their cognitive impairments. ((c) 2006 APA, all rights reserved).

Inference of mental states in patients with Alzheimer's disease.

INTRODUCTION: The ability to determine what someone thinks or knows often requires an individual to infer the mental state of another person, an ability typically referred to as one's "theory of mind". The present study tests this ability in patients with mild-to-moderate Alzheimer's disease (AD). METHODS: Three theory of mind tests and three standardised neuropsychological tests were presented to a group of patients with AD (n = 25) and a group of healthy elderly controls (n = 15). RESULTS: On the first two theory of mind tasks, the performance of the AD patients was nearly perfect and did not differ from that of the controls: AD patients showed no difficulties in either attributing a false belief to another person, or in recognising their own previous false beliefs. On the third theory of mind task, where the key information was embedded in a story narrative, AD patients per formed significantly worse than controls. However, their performance on this task was similar to the control condition, which used a similar story but which did not involve beliefs. CONCLUSIONS: These results, as well as those involving correlations between the neuropsychological tests and performance on the third task, suggest that the AD patients' difficulty may be secondary to their cognitive impairments, rather than a primary impairment in theory of mind.