The effects of several variables on social, emotional, and academic development of high school students were evaluated. Variables were: (1) educational level of parents; (2) marital status of parents; (3) number of children in the family; and (4) family stability. Subjects were 52 10th-grade college-preparatory students from a southern public high school. Data were collected using: the Measures of Psychosocial Development, a self-report inventory based on Eriksonian constructs; the School Environment Preference Survey; and the Study Attitudes and Methods Survey, a measure of dimensions of attitude, motivation, and study habits that contribute to success in school. Multivariate analysis of variance was computed for student scores on each scale of the three measures. Results indicate significant differences in autonomy, initiative, ego integrity, guilt, isolation, academic interest, study methods, manipulation, and alienation toward authority. The implications of the findings for programs to enhance the social, emotional, and academic development of adolescents are discussed. Two tables present data from the study. (SLD)