Lateralized scratching in chimpanzees (Pan troglodytes): Evidence of a functional asymmetry during arousal

This study evaluated laterality in scratching by chimpanzees (n = 89) during socially arousing circumstances. Hand use and the side of the body scratched was recorded during a baseline and experimental condition. In the experimental condition, chimpanzees were shown a video of other conspecifics sharing, fighting over, and consuming a watermelon. Self-touches were categorized as either rubs or scratches. The chimpanzees showed a significant right hand bias for rubbing and also significantly directed the rubs to the right side of the body. For scratching, the chimpanzees showed no hand preference but a significant bias for scratching on the left side of the body. These results support the view that the right hemisphere regulates the autonomic nervous system during arousal.     

Delusions and decision-making style: use of the Need for Closure Scale

Clinicians and researchers have suggested that rapidity in belief formation, due to having a high 'need for closure' (NFC), may contribute to the acceptance of delusional explanations. The aim of the study is to determine whether NFC has such a direct link with delusions. A secondary aim is to examine if NFC is related to the delusion-associated reasoning process of 'jumping to conclusions'. One hundred and eighty-seven patients with psychosis, recruited for a treatment trial of psychological therapy (the PRP trial), completed the Need for Closure Scale (NFCS), symptom measures, and probabilistic reasoning tasks. The NFCS was considered in terms of its two dimensions: a desire for simple structure and a preference for quick, decisive answers. The individuals with psychosis reported being poor at making quick, decisive answers but required a greater need for simple structure. NFC was associated with levels of anxiety and depression. There were weak links between NFC and both positive and negative symptoms of psychosis, but these were explained by differences in affect. NFCS scores were unrelated to jumping to conclusions. Contrary to the argument that NFC is directly linked to delusions, individuals with delusions actually perceive themselves as indecisive. There was no evidence that NFC-at least as assessed by the NFCS-could be a proximal cause of delusions. Any potential effect on psychotic symptom presentation is indirect, mediated through affect. The use of the NFCS on its own in the study of psychotic symptoms cannot be recommended.     

Helping one's way to the top: self-monitors achieve status by helping others and knowing who helps whom

The authors argue that high self-monitors may be more sensitive to the status implications of social exchange and more effective in managing their exchange relations to elicit conferrals of status than low self-monitors. In a series of studies, they found that high self-monitors were more accurate in perceiving the status dynamics involved both in a set of fictitious exchange relations and in real relationships involving other members of their social group. Further, high self-monitors elevated their social status among their peers by establishing a reputation as a generous exchange partner. Specifically, they were more likely than low self-monitors to be sought out for help and to refrain from asking others for help. This behavior provides one explanation for why high self-monitors acquire elevated status among their peers--they are more attuned to status dynamics in exchange relations and adapt their behavior in ways that elicit status.     

Masculinity and femininity predict optimal mental health: a belated test of the androgyny hypothesis

In this study, we examined the relationship between psychological androgyny and optimal mental health in a sample of adults seeking career consultation (N = 154). Most earlier research on the subject employed self-report measures of well-being or adjustment. In this study, we employed an "observer-by-proxy" measure of optimal mental health that, although based on self report data, provides an empirically based estimate of ratings that clinicians would make using the California Q-set (Block, 1961/1978). High levels of both masculinity and femininity are associated with higher levels of optimal mental health. These findings represent a rare example of support for the additive androgyny hypothesis and argue for its further study. We also discuss the construct validity of the masculinity and femininity scales we used, and we argue for further study of our mental health measure.     

Temporal differences in trait self-ascription: when the self is seen as an other

Seven studies exploring people's tendency to make observer-like attributions about their past and future selves are presented. Studies 1 and 2 showed temporal differences in trait assessments that paralleled the classic actor-observer difference. Study 3 provided evidence against a motivational account of these differences. Studies 4-7 explored underlying mechanisms involving differences in the focus of attention of the sort linked to the classic actor-observer difference. In Study 4, people perceived past and future selves from a more observer-like perspective than present selves. In Studies 5 and 6, manipulating attention to internal states (vs. observable behavior) of past and future selves led people to ascribe fewer traits to those selves. Study 7 showed an inverse relationship for past and present selves between observer-like visual focus and salience of internal information.     

Pigeons encode absolute distance but relational direction from landmarks and walls

In recent studies, researchers have examined animals' use of absolute or relational distances in finding a hidden goal. When trained with an array of landmarks, most animals use the default strategy of searching at an absolute distance from 1 or more landmarks. In contrast, when trained in enclosures, animals often use the relationship among walls. In the present study, pigeons were trained to find the center of an array of landmarks or a set of short walls that did not block external cues. Expansion tests showed that both groups of pigeons primarily used an absolute distance strategy. However, on rotational tests, pigeons continued to search in the center of the array, suggesting that direction was learned in relation to array.     

Manic thinking: independent effects of thought speed and thought content on mood

This experiment found that the speed of thought affects mood. Thought speed was manipulated via participants' paced reading of statements designed to induce either an elated or a depressed mood. Participants not only experienced more positive mood in response to elation than in response to depression statements, but also experienced an independent increase in positive mood when they had been thinking fast rather than slow--for both elation and depression statements. This effect of thought speed extended beyond mood to other experiences often associated with mania (i.e., feelings of power, feelings of creativity, a heightened sense of energy, and inflated self-esteem or grandiosity).     

Taking the task seriously: reflections on measures of color acquisition

The experiments described in the lead articles by Kowalski and Zimiles and by O'Hanlon and Roberson examine factors that lead to color term acquisition. These experiments touch on the debate regarding the relative contributions of language and concepts in word learning. In this reflection, we examine how conclusions concerning the debate depend deeply on the particular task presented to children, and we propose an alternative approach to studying color term acquisition.     

Scope of attention, control of attention, and intelligence in children and adults

Recent experimentation has shown that cognitive aptitude measures are predicted by tests of the scope of an individual's attention or capacity in simple working memory tasks and also by the ability to control attention. However, these experiments do not indicate how separate or related the scope and control of attention are. An experiment with 52 children (10 to 11 years old) and 52 college students included measures of the scope and control of attention, as well as verbal and nonverbal aptitude measures. The children showed little evidence of using sophisticated attentional control, but the scope of attention predicted intelligence in that group. In adults, both the scope and control of attention varied among individuals and accounted for considerable individual variance in intelligence. About one third that variance was shared between scope an d control, and the rest was unique to one or the other.Scope and control of attention appear to be related but distinct contributors to intelligence.     

Modeling college women's perceptions of elite leadership positions with Social Cognitive Career Theory

The utility of Social Cognitive Career Theory (SCCT; Lent, Brown, & Hackett, 1994) for predicting college women's interests and goals for positions of elite leadership was examined with 156 undergraduate women at a public university. They completed measures of elite leadership self-efficacy expectations, outcome expectations, interests, and goals. Results supported SCCT as a theoretical framework for understanding internal factors that may contribute to women's elite leadership interests and goals. Self-efficacy and outcome expectations for elite leadership positions related positively to interests and goals for such positions, and self-efficacy and outcome expectations each contributed unique variance to the prediction of elite leadership interests. Outcome expectations partially mediated the relation between elite leadership self-efficacy and interests, interests partially mediated the relation between elite leadership outcome expectations and goals, and the combination of elite leadership interests and outcome expectations completely mediated the relation between self-efficacy for elite leadership positions and elite leadership goals.