A three-year longitudinal study was conducted to measure two aspects of adolescents' self-concept development: continuity/discontinuity and stability/instability. Results indicated that adolescent self-concept results from continuous growth based on social circumstances and cognitive skills and competencies. (Author/DB)

Considers the problems inherent in researching changes in social values and individual perspectives among selected age groups. Asserts that studies aimed at researching both aspects need to be organized as longitudinal studies. Utilizes data taken from a study of East and West Berlin adolescents to reveal specific research problems. (MJP)