Reproducibility of clinical data I: continuous outcomes

Across a variety of clinical settings, repeated measurements on an individual, obtained under identical circumstances, often differ from one another. This implies the measurements lack perfect reproducibility. Topics related to reproducibility of clinical measurements are introduced in this paper. In this first of two parts, continuous outcomes are addressed. The intraclass correlation coefficient, ρ, has been the traditional coefficient of reproducibility for continuous outcomes. The importance of ρ regarding observations on an individual, and observations among populations, is outlined. Estimation and inferential procedures for ρ are reviewed and worked examples are provided. Copyright © 2004 John Wiley & Sons, Ltd.     

Problem Behavior and Heart Rate Reactivity in Adopted Adolescents: Longitudinal and Concurrent Relations

The present longitudinal study examined resting heart rate and heart rate variability and reactivity to a stressful gambling task in adopted adolescents with aggressive, delinquent, or internalizing behavior problems and adopted adolescents without behavior problems (total N=151). Early‐onset delinquent adolescents showed heart rate hyporeactivity to the stress‐eliciting gambling task compared to late‐onset delinquent adolescents and adolescents without behavior problems. Heart rate, heart rate variability, and reactivity to stress were not related to environmental factors such as early‐childhood parental sensitivity, parental socioeconomic status, or adoptee's health status at arrival. We conclude that the distinction between delinquency and aggression and between childhood‐onset and adolescence‐onset delinquency is important for the study of stress reactivity in adolescents.     

Social representations of diversity: multi/intercultural education in a South African urban school 1

The story of School X started in South Africa in 1875. At that time, the school was built for white children only. More than hundred years later, the 1994 elections demarcated the end of the apartheid era and the school enrolled black Xhosa‐speaking children for the first time. As a result, in 2004, 90% of the students were black Xhosa‐speaking. The theoretical perspectives of our study are based on notions of multicultural and intercultural education, and of diversity. Our study is embedded in a socio‐constructivist inquiry paradigm. Using questionnaires and interviews, we aimed to understand the social representations regarding diversity of a principal, a teacher, seven students and four parents in a K‐7 open school. We examined diversity of values, cultures, religions, languages, attitudes, beliefs, behaviors, etc. regarding a multi/intercultural perspective in education. We attempted to discern what the participants’ understandings of diversity were, how they identified diversity, and why they justified their practices and actions with respect to diversity.

The song can only be beautiful if we all play the same tune. (Esmé Goosen, Multimedia, 2004)

This is the title of a painting that is part of an exhibition in Nelson Mandela Metropolitan Museum of Art, Port Elizabeth, South Africa     

The effects of fatal vision goggles on drinking and driving intentions in college students

The present study was designed to examine the effectiveness of Fatal Vision Goggles in reducing intentions to drink and drive. Participants performed a field sobriety task and drove in a traffic simulator while wearing the goggles. A regression analysis was performed in order to predict changes in intentions to drink and drive, using typical drinking patterns, perceived likelihood of getting into a collision when drinking and driving, self efficacy, and driving independence as predictor variables. Results showed that drinking and driving intentions were reduced following the use of Fatal Vision Goggles among those that typically drink more during outings, among those that believe the likelihood of collisions when drinking and driving are greater, and among those less likely to drive to achieve independence and autonomy. These results indicate that Fatal Vision Goggles can be an effective tool in altering drinking and driving attitudes among drivers with specific attitudinal and personal characteristics.     

Predictors of retention in an alcohol, tobacco, and other drug prevention study

This article explored retention patterns, as well as factors that predicted these patterns, in the evaluation of a relationship-based substance abuse prevention intervention study that targeted inner-city African American youth. A total of 851 contacts were made to retain 82% (n = 104) of the baseline sample (N = 127) in the evaluation. Results from multinomial regression analyses indicated that participants who were retained in the evaluation were more likely to perceive alcohol, tobacco, and other drug use as less risky and were more likely to report higher levels of family supervision than were evaluation attrits. Those who were easy to retain reported lower family conflict and fewer family relocations during the past year than those who were difficult to retain. Implications of these findings for developing retention strategies, as well as future research, are discussed.