Recent approaches to empirical derivation and validation of alcoholic subtypes which involve cluster analysis wihin a single multivariate assessment domain have been questioned. To investigate more clinically meaningful subtypes in a sample of 245 male alcoholics, cluster analysis was performed on a combination of variables from four assessment…

This article reviews and critiques the literature on the effects of participation in aerobic exercise on psychological/behavioral variables for persons with mental retardation and associated disabilities. Findings suggested that participation in an exercise program produces immediate, but not durable, benefits in the psychological and behavioral…

Youth violence is a serious global public health problem. Despite a decline in homicide rates across the United States during the 1990s, homicide rates are again rising and continue to claim the lives of many young people. The human and economic toll of violence on young people, their families, and society is high. Homicide is the second leading…

Investigates the manifestations and socialization processes of only and sibling children for improved implementing of the Chinese one-child family program planning. (HOD)

Even though attrition presents a serious threat to the validity of longitudinal research, there is a lack of standardization for reporting it. To examine the effectiveness of four tests for attrition -- two for external validity and two for internal validity -- the tests were applied to two large scale projects: the first, Project HASP, is a…