Suicide and the contemporary woman: Are male and female suicide rates converging?

Nationwide statistics on White suicide rates for the years 1960–1978 are examined to assess whether the suicide rates of women are increasing relative to those of men. This is accomplished by calculating for the total population and for several age groupings the sex differential (SD), which is defined as the percentage of suicides which are female after adjustments are made for the sex distribution in the population. The data reveal that the SD narrowed from 1960–1967, held steady from 1968–1972, and then widened slightly from 1973–1978. The most important aspects of these trends are that (a) the narrowing of the SD is due more to declining suicide rates among older (over-40) males than to increasing female suicide rates, and (b) the narrowing of the SD and the small increases in female suicide rates occurred prior to 1970 and thus were earlier than would be expected on the basis of changing sex-role expectations. Post hoc explanations of these patterns refer to methodological factors and to changes in social integration resulting from a variety of sociohistorical factors.     

Stimulus factors in the isolation-induced aggression of Bobwhite quail and Khaki Campbell ducklings

Two studies examined the relative abilities of conspecific-derived visual and tactile stimulation to modulate the occurrence of isolation-induced aggression in Bobwhite quail and Khaki Campbell ducklings. In Experiment 1, subjects were permitted visual stimulation from conspecifics but were deprived of conspecific tactile stimulation. In both species, these subjects subsequently showed significantly less aggression towards conspecifics than birds that had been deprived of both visual and tactile stimulation from conspecifics. In Experiment 2, one group of subjects was permitted conspecific tactile stimulation but was deprived of conspecific visual stimulation. Again for both species, these subjects subsequently exhibited significantly less aggressive behavior towards conspecifics than did subjects that had been both visually and tactually de-prived. In sum, the present research suggests that both tactile and visual stimulation from a conspecific are individually sufficient to reduce isolation-induced aggression in these precocial buds.     

Isolation-induced aggression in newly hatched ducklings.

Newly hatched Khaki Campbell ducklings (Anas platyrhynchos domesticus) were initially housed in pairs and subsequently transferred to isolated housing conditions. Subjects living with another bird displayed filial behavior and little aggression upon encountering another duckling in a test arena. In contrast, ducklings housed in isolation exhibited aggressive pecking in addition to filial behavior when another duckling was subsequently encountered. In Experiment 2, ducklings were housed with an imprinting object (i.e., an object that elicits attachment behavior), but they were otherwise isolated from other birds. These subjects displayed little aggression when they were subsequently reunited with a conspecific, indicating that the aggression-precluding effects of social housing are not limited to the particular social stimulus with which the ducklings are housed. In Experiment 3, ducklings were again housed with an imprinting object, but this time the object was behind glass, thereby precluding tactile contact with it. Since these birds also exhibited little aggression when reunited with a conspecific, it is apparent that visual stimulation from an imprinting object is sufficient in itself to preclude subsequent aggression. These findings suggest that stimulation that elicits attachment behavior is the critical factor mediating isolation-induced aggression.     

Acquisition of Effector-Specific and Effector-Independent Components of Sequencing Skill

In a serial reaction time task, participants practiced a repeating sequence with 1 hand. In interleaved blocks, they responded to random sequences with the other hand. Experiment 1 was composed of 5 sessions, each consisting of 30 blocks. Intermanual transfer, reflecting a hand-independent component of sequence knowledge, increased across session. A smaller but significant, nontransferable, and hand-specific component was evident in each session and did not increase with practice. Experiment 2 comprised only 1 session. Uninterrupted practice (no interleaved random blocks) improved hand-independent sequence learning in comparison with interrupted practice (as implemented in Experiment 1), whereas hand-specific sequence learning was unaffected by this between-subjects manipulation. These findings suggest separate mechanisms for effector-independent sequence learning and effector-specific acquisition of optimized response coarticulation.     

Aging and the vulnerability of speech to dual task demands

Tracking a digital pursuit rotor task was used to measure dual task costs of language production by young and older adults. Tracking performance by both groups was affected by dual task demands: time on target declined and tracking error increased as dual task demands increased from the baseline condition to a moderately demanding dual task condition to a more demanding dual task condition. When dual task demands were moderate, older adults' speech rate declined but their fluency, grammatical complexity, and content were unaffected. When the dual task was more demanding, older adults' speech, like young adults' speech, became highly fragmented, ungrammatical, and incoherent. Vocabulary, working memory, processing speed, and inhibition affected vulnerability to dual task costs: vocabulary provided some protection for sentence length and grammaticality, working memory conferred some protection for grammatical complexity, and processing speed provided some protection for speech rate, propositional density, coherence, and lexical diversity. Further, vocabulary and working memory capacity provided more protection for older adults than for young adults although the protective effect of processing speed was somewhat reduced for older adults as compared to the young adults.     

El papel de los procesos de atribución en la conformidad y el disentimiento: Reencontrando la situación de Asch

RESUMEN

El presente artículo reexamina la situación de los experimentos sobre conformidad de Asch. La situación experimental propuesta procura ser más representativa del modo en el que las presiones a la conformidad actúan fuera del laboratorio, definiendo tres condiciones que permiten distintas atribuciones. Los resultados apoyan las hipótesis de partida, destacando que la condición experimental que reproduce la situación de Asch permite menos inconformismo y menos confianza entre los disconformes que las otras dos, y entre éstas, la situación en la que debían postularse diferencias de prioridades en los evaluadores para explicar la propia disidencia era menos propicia para el inconformismo y la confianza en el criterio propio. Finalmente se discuten las implicaciones del experimento sobre las presiones a la conformidad y los procesos de atribución.     

Young Children's Reactions to Mothers’ Disclosure of Maternal HIV+ Serostatus

Little is known about the impact of maternal disclosure of HIV-positive serostatus on young children. The objective of this study was to explore this topic, utilizing in-depth qualitative interviews. Qualitative interviews were conducted with 47 mothers who had disclosed to their young, well child, and with the children. The most prevalent child response was anxiety, primarily focused on the mother's health and fear of her death. A number of children also worried about other people finding out, and seemed aware of the stigma surrounding HIV. For most children anxiety decreased over time, although for a small number it sustained and became maladaptive. The majority of children appeared to adjust well to maternal disclosure. Mothers who are planning to disclose their serostatus to their young children should be encouraged to plan for appropriate psychosocial follow-up following the disclosure, with special focus on the stigma associated with HIV.     

Thirty-something categorization results explained: selective attention, eyetracking, and models of category learning

An eyetracking study testing D. L. Medin and M. M. Schaffer's (1978) 5-4 category structure was conducted. Over 30 studies have shown that the exemplar-based generalized context model (GCM) usually provides a better quantitative account of 5-4 learning data as compared with the prototype model. However, J. D. Smith and J. P. Minda (2000) argued that the GCM is a psychologically implausible account of 5-4 learning because it implies suboptimal attention weights. To test this claim, the authors recorded undergraduates' eye movements while the students learned the 5-4 category structure. Eye fixations matched the attention weights estimated by the GCM but not those of the prototype model. This result confirms that the GCM is a realistic model of the processes involved in learning the 5-4 structure and that learners do not always optimize attention, as commonly supposed. The conditions under which learners are likely to optimize attention during category learning are discussed.