Discrimination of five-dimensional stimuli by pigeons: Limitations of feature analysis

Pigeons were trained to discriminate between stimuli constructed using five orthogonal two-valued features. The stimuli consisted of stylized monochrome drawings of seeds. Two different training procedures (conditional and simultaneous discrimination) were used. In the first two experiments, the discrimination required was between polymorphous categories, in which a positive stimulus was defined as one in which three or more of the five features took their positive values. Discrimination in both experiments was imperfect; the pigeons' behaviour only came under the control of a subset of the available features (one to three in Experiment 1, three or four in Experiment 2). In Experiment 3, single features had to be discriminated, while the remaining features varied. It was found that all five features of the “seed” stimuli could be discriminated, but one of them was exceptionally difficult. The results show that pigeons do not reliably use all the features available to them when making category discriminations. This casts doubts on feature analysis as a basis for the excellent performance pigeons show when required to discriminate between categories of natural objects.     

What Makes a Feminist? Predictors and Correlates of Feminist Social Identity in College Women

What factors predict self-identification as a feminist? College women ( N = 233) were given measures of feminist ideology, feminist identity development, evaluation of feminists, collectivism and individualism. Feminist identification was measured both as a dichotomous and a continuous variable. Measured dichotomously, feminist self-identification was predicted by not having conservative beliefs and having a positive general evaluation of feminists. In addition, self-identified feminists were more likely to believe in collective action, to hold liberal, radical, and womanist ideologies, and to endorse items in the Synthesis stage of identity development. They were less likely to believe a feminist is a lesbian, to endorse items in the Passive Acceptance stage, and to believe in the existence of a meritocracy. Measured continuously, degree of feminist identity was predicted by having a positive general evaluation of feminists, not having conservative beliefs, and endorsing items in the Revelation and Embeddedness/Emanation stages of identity development. The two measures of feminist identity were not entirely congruent, underlining the importance of methodological differences in measuring social identity.     

Body image dissatisfaction among women with scleroderma: extent and relationship to psychosocial function.

Body image dissatisfaction and its relationship to psychosocial function were investigated in 127 women with scleroderma Results indicated elevated body image dissatisfaction, with participants reporting higher levels than a sample of patients with severe burn injuries. Age, skin tightening above the elbows, and functional disability were related to heightened body image dissatisfaction, suggesting that younger patients with more severe disease may be at greatest risk for developing body image concerns. Path analysis revealed that depression mediated the relationship between body image dissatisfaction and psychosocial function. Results suggest that body image dissatisfaction is a significant concern in women with scleroderma and should be assessed routinely. Early identification and treatment of body image dissatisfaction may help prevent the development of depression and psychosocial impairment in this population.     

Tourette's syndrome—case report and contribution to the Prata/Masson-Nunn controversy

The conflicting views on Tourette's syndrome (TS) and its management in children put forward in the November 1985 issue of Journal of Family Therapy (Nunn, 1985; Prata & Masson, 1985) and the Editorial in the same issue prompt us to report a case. A twelve-year-old boy with TS managed on interactional lines snowed changes more modest than those achieved by Prata and Masson, and we address some of the issues raised by Nunn in his critique of their paper.     

PTSD Symptom Clusters Are Differentially Associated with Components of the Acquired Capability for Suicide

Previous research has established the link between posttraumatic stress disorder (PTSD) and suicidal behavior. In the current study, constructs proposed to explain this relationship were examined, applying the framework of the interpersonal‐psychological theory of suicide (IPTS). Relationships between acquired capability for suicide (ACS; i.e., fearlessness about death [FAD] and pain tolerance) and specific PTSD symptom clusters were explored. In a sample of 334 trauma‐exposed undergraduates, anxious arousal and FAD were negatively associated, and numbing and pain tolerance were positively associated. Results establish a foundation for investigating the role of ACS in understanding observed relationships between suicidal behavior and PTSD symptoms.     

Thoughts of Self‐Harm and Help‐Seeking Behavior among Youth in the Community

The association between thoughts of self‐harm and help‐seeking among youth with symptoms of depression was examined. Data were drawn from the Health Behavior of School‐aged Children Study (n = 15, 686), a nationally representative sample of youth in the United States. Analyses focused on comparing help‐seeking behaviors among youth with and without thoughts of deliberate self‐harm (DSH) when depressed. Depressed youth with thoughts of DSH exhibited different patterns of help‐seeking than those without. Both groups most frequently sought help from friends and parents. However, adolescents with thoughts of DSH were statistically more likely than youth without to seek help from friends (DSH: 69.9%; no DSH: 57.8%; AOR = 1.46), but less likely to seek help from parents (DSH: 53.7%; no DSH: 73.1%; AOR = 0.47). Youth with DSH were more likely to seek help from school officials (AOR = 1.05), health professionals (AOR: 1.83), or a counselor (AOR = 1.93) compared with those without thoughts of DSH who were more likely to seek help from a sibling (AOR: 0.77) or other relatives (AOR: 0.78). Results may help inform programs to improve identification of youth at risk of self‐harm in community and school settings.     

THE INFLUENCE OF MISOGYNOUS RAP MUSIC ON SEXUAL AGGRESSION AGAINST WOMEN

The purpose of this study was to determine the effects of cognitive distortions concerning women on sexually aggressive behavior in the laboratory. Twenty-seven men listened to misogynous rap music and 27 men listened to neutral rap music. Participants then viewed neutral, sexual-violent, and assaultive film vignettes and chose one of the vignettes to show to a female confederate. Among the participants in the misogynous music condition, 30% showed the assaultive vignette and 70% showed the neutral vignette. In the neutral condition, 7% showed the sexual-violent or assaultive vignette and 93% showed the neutral vignette. Participants who showed the sexual-violent or assaultive stimuli reported that the confederate was more upset and uncomfortable in viewing these stimuli than did participants who showed the neutral vignette. These findings suggest that misogynous music facilitates sexually aggressive behavior and support the relationship between cognitive distortions and sexual aggression.