During the past decade increased attention has been directed toward alcoholism as a family system problem. Recent publications have identified characteristics of the "alcoholic family" system and a model of psychosocial development specific to children of alcoholics. Both theoretical frameworks proposed that family and individual growth and development were delayed or stagnated by the effects of parental alcoholism. This study explored possible effects of problem parental alcohol use or alcoholism on adolescent development. The variables studied were differentiation from family, identity achievement, and intimacy in close relationships. Two data collection methods were used: a mailed questionnaire and an interview with a subgroup of respondents who returned the questionnaire. Respondents were classified as children of alcoholics (COAs) or children of nonalcoholics (NCOAs) based on answers to one of two questions posed in the demographics' section. Questionnaires were distributed at a four-year college to sophomores, juniors, and seniors residing on-campus. A total of 160 questionnaires were returned. Twenty-four percent of the respondents reported one or more problem drinking parents. Interviews were completed with ten students, four of whom were in the COA group. Student's t tests, analysis of variance and multiple regression tests were performed an the data between and within groups. Results from the between groups analyses indicated that differentiation From family was more developed for the NCOA group. Overall development did not appear affected by parental problem drinking. The within group analysis tested for differences based on gender of problem drinking parent. ANOVA results indicated no significant differences among mean scores on the measures of differentiation, identity, and intimacy. The results of multiple regression analyses indicated that differentiation and identity were statistically significant in the prediction of intimacy, although the model best explained intimacy for the COA group. Results suggested that development is most delayed for daughters of alcoholic mothers. / Ph. D.