Repeated measures and longitudinal studies arise often in social and behavioral science research. During the planning stage of such studies, the calculations of sample size are of particular interest to the investigators and should be an integral part of the research projects. In this article, we consider the power and sample size calculations for…

Adolescent adjustment measures may be related to each other and to the social environment in various ways. Are these relationships similar in genetic and environmental sources of covariation, or different? A multivariate behaviorgenetic analysis was made of 6 adjustment and 3 treatment composites from the study Nonshared Environment in Adolescent…

We evaluate the effects of marital resources and early-life experiences on recent domestic violence and attitudes about wife abuse among 2,074 married Cambodian women. Household standard of living was negatively associated with physical domestic violence. Women with 8-13 fewer years of schooling than their husbands more often experienced physical…

This study investigates the reasons given by Finnish adolescents for their own alcohol use, and for the use of alcohol by others. In 1999, a questionnaire on reasons for drugs use was administered to a sample of adolescents aged 14-16 (N=488). It was found that the reasons given (i.e., "attributions") involving inner subjective…

Industrial culture focuses mainly on the production of "things"--of static objects. Knowledge, on the other hand, is constantly in flux, like a flowing stream. Conventional industrial notions lead policy makers to believe that the addition of a knowledge-based industry to an existing industrial base makes a knowledge economy. This is not the case.…

Using a national sample of 3,774 undergraduates, this study investigated the effect of involvement in the college experience on learning for students who were employed off campus. Students employed more than 20 hours per week off campus engaged with faculty and peers less frequently than other students on all variables except discussing ideas with…

This research examined whether distinct student profiles emerged from measures of interest, mastery goals, task value, and self-efficacy in samples of Norwegian student nurses and business administration students. Additionally, profile differences in self-reported strategy use and epistemological beliefs were examined, as well as changes in…

The present research examined relationships among medical school applicants' preferred approaches to learning, methods of instruction, and specialty areas (n=912). Based on confidential responses to a progressive series of paired comparisons, applicants' preferences for lecture (L), self-study (SS), group discussion (GD), and computers (C) were…

Background: The ongoing controversy over the distinction between autistic disorder and Asperger's disorder is important to resolve because of the implications regarding an understanding of the aetiology and prognosis, and the diagnostic and clinical practices relating to these conditions. This paper provides a critical evaluation of current…

The present study examined the effect of parental loss and gender of adolescents on their coping with stress. Sample included those adolescents who had either of their parents died (N=40) and those having both living parents (N=40). It was hypothesized that adolescents with one parent alive would differ in their ways of coping with stress compared…

Normal and psychopathological patterns of behavior symptoms in preschool children were described by a classification approach using cluster analysis. The behavior of 406 children, average age 4 years 9 months, from the general population was evaluated at home visits. Seven clusters were identified based on empirically defined dimensions:…

This research examined adolescents' gender identity in relation to the peer context and their self-concept. Participants were 229 adolescents who completed questionnaire measures of self-concept and multidimensional gender identity. Regression analysis indicated peer acceptance partially mediated the relation between self-perceived gender…

Concerns about school safety and disruptive behavior, as well as increasing use of zero tolerance policies, have resulted in escalating rates of exclusionary disciplinary practices (out-of -school suspension and expulsion) in America?s schools. The present study examines suspension rates in Kentucky middle schools (N=161), using both quantitative…

In order to ease the academic and social transition, to forge a solid foundation for the rest of the academic career, and to increase the likelihood that students will persist through the second year and beyond, curricula and cocurricular programs are designed to meet the needs of first-year students and facilitate learning and development.…

A prototype of a biofeedback system designed to treat dyslexia by improving heart-rate variability was evaluated in a single blind study of dyslexic adults. Treatment consisted of four 15 minute exposures to a visual display synchronized with either the participant's own cardiac cycle (intervention condition), or of a synthesized cardiac cycle…