Focusing the spotlight: individual differences in visual attention control

A time-course analysis of visual attention focusing (attentional constraint) was conducted in groups of participants with high and low working memory spans, a dimension the authors have argued reflects the ability to control attention. In 4 experiments, participants performed the Eriksen flanker paradigm under increasing levels of speed stress. Conditional accuracy functions were derived to measure the time course of attentional constraint. The data showed that accuracy rates rose toward asymptote at different rates, with participants with high working memory spans reaching peak performance before participants with low working memory spans. The authors interpret these data in terms of a rate of attention constraint model.     

Attentional window in schizophrenia and schizotypal personality: Insight from negative priming studies

One of the core deficits that characterizes schizophrenia is an increase in distractibility and disinhibition at all levels of information processing. Patients with schizophrenia seem unable to focus attention on the relevant events while ignoring the irrelevant stimuli. This pattern of behavior is also observed in unmedicated schizotypal individuals who may carry liability for schizophrenia. In this review, we focus on studies of attentional inhibition, as assessed by the negative priming paradigm, to elucidate the relationships among deficits in inhibition, clinical symptoms and medication effects. We then consider models of the etiology of deficits in negative priming in schizophrenia and schizotypal personality. Finally, we discuss the potential power of utilizing hypothesis-driven cognitive paradigms in psychiatric research.     

On the division of short-term and working memory: an examination of simple and complex span and their relation to higher order abilities

Research has suggested that short-term memory and working memory (as measured by simple and complex span tasks, respectively) are separate constructs that are differentially related to higher order cognitive abilities. This claim is critically evaluated by reviewing research that has compared simple and complex span tasks in both experimental and correlational studies. In addition, a meta-analysis and re-analyses of key data sets were conducted. The review and analyses suggest that simple and complex span tasks largely measure the same basic subcomponent processes (e.g., rehearsal, maintenance, updating, controlled search) but differ in the extent to which these processes operate in a particular task. These differences largely depend on the extent to which phonological processes are maximized and variability from long list lengths is present. Potential methodological, psychometric, and assessment implications are discussed and a theoretical account of the data is proposed.     

Spirituality and the Health of College Students

Objectives  The purpose of this study was to examine the relationship between spirituality and health risks of college students. Methods  Undergraduate students enrolled in Personal Health and Wellness classes at The University of Tennessee were selected to participate in the study. Two-hundred twenty-one students were administered two instruments: The College Student Appraisal of Risks Survey (The CARS) and the Spirituality Scale (SS). Results  Significant relationships between self-reported levels of spirituality and the health of college students were indicated during the study. Conclusions  College students integrating a spiritual component while processing decisions about risks that could negatively affect their health experienced better health outcomes. The significance of the study is that this research is an important step toward understanding the role that spirituality plays in the various dimensions of health in young adults.

Research report — Beguiled by Bayes: a re-analysis of Mossman and Hart's estimates of malingering

Bayes' theorem has been successfully applied to clinical decision making in circumstances where the prevalence rate is both stable and well established. An attempt by Mossman and Hart (1996) to apply Bayes' theorem to malingering is critically examined. When marked fluctuations in the base rates of malingering (both within and across settings) are considered, this model appears to have little clinical utility. For the sake of illustration, Mossman and Hart data were reanalyzed, taking into account the pronounced variation in base rates. Within a 90% confidence level, the estimates of malingering for many scores extended the full range from 0% to 100%. © 1998 John Wiley & Sons, Ltd.