Eye-hand interactions in tracing and drawing tasks

We report a preliminary analysis of the interactions between eye and hand during tracing and drawing of four simple shapes. Eye and hand movements were recorded using the ASL 504 system and the Flock of Birds system, respectively. During tracing, pen tip and eye were tightly coupled, with participants making a series of small saccades just in front of the moving pen, interspersed with periods of smooth pursuit. During drawing, saccades were fewer and larger and pursuit was less frequent. Observed eye-hand interactions suggested a bidirectional relationship between the eye and hand. These findings are explained in terms of the differing degree that the two tasks employ visual detail, external or internal cues and eye-hand coordination.     

"I find you to be very attractive..." Biases in compliance estimates to sexual offers

The classic experiments by Clark and Hatfield on sex differences in compliance to offers of dates, apartment visits, and casual sex, and the related informal project of Molzer served as the foundation for the present study. However, whereas individuals in these previous investigations directly approached opposite-sex participants, our research employed surveys to gauge compliance. A sample of 195 male and 179 female Austrian adults were provided with written forms of the Clark and Hatfield scenarios and asked to predict the rates of compliance on a thermometer scale ranging from 0% to 100%. Results indicated that compliance estimates are largely effected by the sex of the receiver to these offers, and to a lesser degree, participants' age and relationship status. The sex of the participant did not significantly effect the results. Relative to the previous work, the compliance rate of males was overestimated, while that of females was underestimated. We offer explanations for the differences in findings between the original investigations and our research, discuss the importance of contextual factors as well as the generality of the Clark-Hatfield findings, especially with respect to females' near-zero receptivity to explicit sexual offers, and point out the relevance of the current findings for health psychology.     

A systematic investigation of same and cross modality priming using written and spoken responses

Effects of presentation modality and response format were investigated using visual and auditory versions of the word stem completion task. Study presentation conditions (visual, auditory, non-studied) were manipulated within participants, while test conditions (visual/written, visual/spoken, auditory/written, auditory/spoken, recall-only) were manipulated between participants. Results showed evidence for same modality and cross modality priming on all four word stem completion tasks. Words from the visual study list led to comparable levels of priming across all test conditions. In contrast, words from the auditory study list led to relatively low levels of priming in the visual/written test condition and high levels of priming in the auditory/spoken test condition. Response format was found to influence priming performance following auditory study in particular. The findings confirm and extend previous research and suggest that, for implicit memory studies that require auditory presentation, it may be especially beneficial to use spoken rather than written responses.     

Research ethics for mental health science involving ethnic minority children and youths

In response to U.S. Public Health Service projects promoting attention to disparities in the outcomes of mental health treatments, in July 2001, the American Psychological Association, the National Institute of Mental Health, and the Fordham University Center for Ethics Education convened a group of national leaders in bioethics, multicultural research, and ethnic minority mental health to produce a living document to guide ethical decision making for mental health research involving ethnic minority children and youths. This report summarizes the key recommendations distilled from these discussions.     

Experimental modification of beliefs in obsessive-compulsive disorder: a test of the metacognitive model

Metacognitive beliefs about the threatening meaning and significance of intrusions are fundamental to the development and maintenance of obsessive-compulsive disorder (OCD) in the metacognitive model (Cognitive therapy of anxiety disorders: a practice manual and conceptual guide, Chichester, UK, Wiley, 1997; Emotional disorders and metacognition: innovative cognitive therapy, Chichester, UK, Wiley, 2000). This predicts that reductions in metacognitive beliefs about intrusions will result in decreased anxiety and compulsions. It was hypothesized that brief (5min) exposure and response prevention configured as a behavioural experiment to challenge metacognitive beliefs would lead to reductions in anxiety, thought fusion beliefs and the urge to neutralize. Furthermore, these reductions would be greater than the effects observed in the same exposure and response prevention task, accompanied by a habituation rationale. The results were consistent with the hypotheses. The clinical implications for the treatment of OCD are discussed.     

Cognitive capacities for behavioural flexibility in wild chimpanzees (Pan troglodytes): the effect of snare injury on complex manual food processing

In chimpanzees, it is only in the restricted context of tool use that manual and cognitive skills have been described, comparable to those that gorillas and orang-utans display in obtaining plant foods. We report the complex food preparation skills used to eat, without tools, the leaves of the tree Broussonettia papyrifera in the Sonso community of chimpanzees at Budongo Forest, Uganda. Able-bodied individuals used multi-stage techniques that required bimanual role differentiation at several stages, and were hierarchical in organisation. A total repertoire of 14 techniques was found, with strong preference in all individuals for either of two of these; 6 additional techniques were found when flowers and leaves were eaten together. However, in this community over 20% of individuals suffer from some form of upper- or lower-limb injury as a result of snares. We investigated the manner of compensation for upper-limb injury. Only the most severely injured showed reduced feeding efficiency. Injured individuals were found to use the same repertoire of techniques as able-bodied chimpanzees. We found no evidence to suggest that injured individuals were able to develop wholly novel techniques optimal for their specific injuries, although shifts in preference for particular techniques did occur. Rather, injured individuals used novel ways of achieving particular steps in the process; by "working around" their impairments; in this way, they managed to use the same techniques as the able-bodied. Since snare injuries generally befall young animals, these results suggest that chimpanzees learn techniques partly through observational learning (of, necessarily, able-bodied individuals). Accepted after revision: 8 February 2001 Electronic Publication     

Goodness-of-fit ethic for informed consent to research involving adults with mental retardation and developmental disabilities

This article reviews current theory and research on informed consent policies for adults with mental retardation within a relational ethics framework that re-conceptualizes consent vulnerability in terms of the goodness-of-fit between participant decisional capacities and the specific consent context. Conceptualizing informed consent competence as a product of the relationship between person and consent context shifts assessment of decisional capacity away from an exclusive focus on a research participant's cognitive deficiencies to (a) an examination of those aspects of the consent setting that are creating or exacerbating consent vulnerability and (b) consideration of how the setting can be modified to produce a consent process that best reflects and protects the hopes, values, concerns, and welfare of adults with developmental disabilities.     

The effect of midazolam on conscious,controlled processing: Evidence from the process-dissociation procedure

The benzodiazepine midazolam produces a dense anterograde amnesia. Recent findings (see, e.g., Hirshman, Passannante, & Arndt, 2001) have demonstrated that midazolam produces larger impairments on explicit memory tests such as free recall and recognition memory than on implicit memory tests such as perceptual identification and free association. Such findings suggest that midazolam impairs conscious, controlled memory processes. In the present experiments, we used Jacoby's (1991, 1998) process-dissociation procedure to examine this hypothesis. Our results demonstrate that midazolam increases the production of old items on the exclusion task and reduces the production of old items on the inclusion task. Moreover, generation effects, hypothesized to arise from conscious processes, are reduced by midazolam on both tasks. Analyses using both independence and redundancy models of the process-dissociation procedure confirm the conclusion that midazolam impairs conscious memory processes.