This article had four goals. First, the authors identified a set of general challenges and questions that a life-span theory of development should address. Second, they presented a comprehensive account of their Motivational Theory of Life-Span Development. They integrated the model of optimization in primary and secondary control and the…

Adolescent parenthood was investigated based on a large panel study known as the National Longitudinal Study of the High School Class of 1972 (NLS) which has tracked over 22,000 adolescents who are now in their early 20's and have experienced many of the near-term consequences of early parenthood. Procedures for creating variables that mark entry…

Suggests typology as initial framework for study of patterns of computer use in the home, along with four sets of independent factors--social status, technical features, sociocultural setting, and personal attributes. This approach integrates patterns of computer utilization with technological, social, and psychological factors to account for…

This monograph is a computer printout which presents a final report from an analysis of data on cooperation among 29 regional groupings in over 16,000 dyadic relationships (interactions between two nations). Regional groupings included geographic areas such as Africa and Latin America and international organizations such as the North Atlantic…