This paper uses a case history approach to present the evolution of two longitudinal studies, Youth in Transition, which involved 8 years of data collection (1966-1974) and Monitoring the Future, for which data collection began in 1975 and continues in the present. The Youth in Transition project is described as a study of the causes and…

This presentation is an informal discussion of a questionnaire context effect which led to an erroneous conclusion in analysis of data from the Monitoring the Future project; an annual survey of high school seniors that has occurred since 1975, and that focuses heavily on their drug use and attitudes about drugs. In 1980, the researchers reported…

This first volume of a planned series summarizes the first 2 years of a 6 year longitudinal study of about 2,200 tenth grade boys in public schools. The broad purposes were to study the student and his changes, plans, and behavior. "Conceptual Framework and Purposes" presents a conceptual framework that views the major criterion areas of growth…

This occasional paper updates and extends earlier papers in the Monitoring the Future project. It provides a detailed description of the project's design, including sampling design; data collection procedures; measurement content; and questionnaire format. It attempts to include sufficient information for others who wish to evaluate the results,…