Comparing dependent correlations

In a recent article in The Journal of General Psychology, J. B. Hittner, K. May, and N. C. Silver (2003) described their investigation of several methods for comparing dependent correlations and found that all can be unsatisfactory, in terms of Type I errors, even with a sample size of 300. More precisely, when researchers test at the .05 level, the actual Type I error probability can exceed .10. The authors of this article extended J. B. Hittner et al.'s research by considering a variety of alternative methods. They found 3 that avoid inflating the Type I error rate above the nominal level. However, a Monte Carlo simulation demonstrated that when the underlying distribution of scores violated the assumption of normality, 2 of these methods had relatively low power and had actual Type I error rates well below the nominal level. The authors report comparisons with E. J. Williams' (1959) method.     

Neural bases of moderation of cortisol stress responses by psychosocial resources

Psychosocial resources have been tied to lower psychological and biological responses to stress. The present research replicated this relationship and extended it by examining how differences in dispositional reactivity of certain neural structures may underlie this relationship. Two hypotheses were examined: (a) psychosocial resources are tied to decreased sensitivity to threat and/or (b) psychosocial resources are associated with enhanced prefrontal inhibition of threat responses during threat regulation. Results indicated that participants with greater psychosocial resources exhibited significantly less cortisol reactivity following a stress task, as predicted. Analyses using functional magnetic resonance imaging revealed that psychosocial resources were associated with greater right ventrolateral prefrontal cortex and less amygdala activity during a threat regulation task but were not associated with less amygdala activity during a threat sensitivity task. Mediational analyses suggest that the relation of psychosocial resources to low cortisol reactivity was mediated by lower amygdala activity during threat regulation. Results suggest that psychosocial resources are associated with lower cortisol responses to stress by means of enhanced inhibition of threat responses during threat regulation, rather than by decreased sensitivity to threat.     

The role of working memory in decoding emotions

Decoding facial expressions of emotion is an important aspect of social communication that is often impaired following psychiatric or neurological illness. However, little is known of the cognitive components involved in perceiving emotional expressions. Three dual task studies explored the role of verbal working memory in decoding emotions. Concurrent working memory load substantially interfered with choosing which emotional label described a facial expression (Experiment 1). A key factor in the magnitude of interference was the number of emotion labels from which to choose (Experiment 2). In contrast the ability to decide that two faces represented the same emotion in a discrimination task was relatively unaffected by concurrent working memory load (Experiment 3). Different methods of assessing emotion perception make substantially different demands on working memory. Implications for clinical disorders which affect both working memory and emotion perception are considered.     

Mindfulness and self-acceptance

The present article will focus on the cognitive theory of mindfulness and its importance in achieving unconditional self-acceptance. The goal of the mindful perspective is to increase cognitive flexibility and to thereby increase behavioral flexibility and the ability to adapt to one’s current environment in a meaningful manner. Empirical evidence spanning four decades attests to the beneficial effects of a mindful vs. mindless perspective. The article will focus on the following aspects of mindfulness as they apply to self-acceptance: the importance of authenticity, the tyranny of evaluation, the benefits of mistakes, the mindlessness of social comparison, the trap of rigid categories, and the acceptance of self as a mindful choice. The article concludes with a number of mindfulness applications geared toward enhancing self-acceptance.     

Tend and Befriend: Biobehavioral Bases of Affiliation Under Stress

ABSTRACT— In addition to fight-or-flight, humans demonstrate tending and befriending responses to stress—responses underpinned by the hormone oxytocin, by opioids, and by dopaminergic pathways. A working model of affiliation under stress suggests that oxytocin may be a biomarker of social distress that accompanies gaps or problems with social relationships and that may provide an impetus for affiliation. Oxytocin is implicated in the seeking of affiliative contact in response to stress, and, in conjunction with opioids, it also modulates stress responses. Specifically, in conjunction with positive affiliative contacts, oxytocin attenuates psychological and biological stress responses, but in conjunction with hostile and unsupportive contacts, oxytocin may exacerbate psychological and biological stress responses. Although significant paradoxes remain to be resolved, a mechanism that may underlie oxytocin's relation to the health benefits of social support may be in view.     

Beyond Affect and Cognition: Identification of the Informational Bases of Food Attitudes1

Two studies were conducted to identify the informational bases of food attitudes. Study 1 was an exploratory study in which participants indicated the importance of food characteristics and emotional reactions for determining their attitudes toward a variety of foods. On the basis of a series of exploratory factor analyses, 5 informational bases of food attitudes were identified: positive affect, negative affect, specific sensory qualities, abstract cognitive qualities, and general sensory qualities. A second confirmatory study corroborated the appropriateness of this 5‐factor structure. Furthermore, the food‐specific attitude structure model was found to have better fit than a more traditional attitude structure model. The implications of these findings for attitude theory, understanding eating behavior, and changing food selection are discussed.     

Effects of drugs and alcohol on behavior,job performance,and workplace safety

A study of records for 1 large U.S. company revealed that employees with positive drug screens were fired, whereas workers who self‐disclosed drug/alcohol problems remained employed. Both groups were offered substance abuse intervention, and some previously fired workers were rehired after they received treatment. Accident results showed that drug‐test positive employees, as compared with self‐referred workers, had a significantly higher accident rate in all categories. Treatment data revealed that drug‐test positive workers had significantly higher accident rates before and after treatment than self‐referred employees. Posttreatment results showed that drug‐test positive employees had a significant decrease in accidents after services, whereas the self‐referred group showed no change.     

Aggression and social status: the moderating roles of sex and peer‐valued characteristics

Research on peer rejection has long emphasized links between aggressive behavior and peer liking, with aggressive children and adolescents being more rejected by peers. However, recent research shows that at least some aggressive students enjoy considerable power and influence and are perceived as “popular” within the peer group. To understand the processes underlying links between aggression and social status, the present research considered three distinct indices of social status (social preference, perceived popularity, and power) and investigated the degree to which the possession of peer‐valued characteristics moderated the links between status and aggression and whether these links varied by sex. A sample of 585 adolescents (grades 6–10) completed peer evaluation measures assessing social status, aggression (overt/physical, indirect/relational), and the degree to which peers possessed eight different peer‐valued characteristics (e.g., attractiveness, athleticism, etc.). Although sociometric indices of status were significantly related to perceived popularity, especially for boys, perceptions of power were more strongly linked to perceived popularity than to sociometric likeability. Moreover, the three indices of social status were differentially related to peers' assessments of aggression and to peer‐valued characteristics, with notable sex differences. As predicted, regression analyses demonstrated that the observed relationships between social status and aggression were moderated by the possession of peer‐valued characteristics; aggressive students who possessed peer‐valued characteristics enjoyed higher levels of perceived popularity and power and less disliking than those who did not. This relationship varied as a function of sex, the type of aggression considered, and the status construct predicted. Aggr. Behav. 32:396–408, 2006. © 2006 Wiley‐Liss, Inc.