This report reviews five studies dealing with drug abuse and adolescence and presents an overview of the social changes which have contributed to the increased use of marijuana and other illicit drugs. The importance of the longitudinal study as a research tool is emphasized in describing the research projects that deal with the epidemiology of…

Four research papers on temperament and school learning and two commentaries are presented. "Early Temperament and Later Educational Outcomes," by Jacqueline V. Lerner, Stella Chess, and Kathleen Lenerz, discusses temperament characteristics and academic attainment. One hundred thirty-three middle class subjects were studied from early infancy…