This study investigates the relations between three academic socialisation processes and late adolescents' internal locus of control. A sample of 249 college students from four ethnic groups completed three measures. Three factors explained 46.44% of the variance in academic socialisation, and the following differences were found: emotional support and active involvement were rated by all as the most frequent practices used by parents, and European Americans rated these significantly higher than did Asian Americans, who reported the highest mean score on "demandingness" practices. Separate multiple regression analyses suggested that among Asian Americans and European Americans, emotional support practices predicted internal locus of control; however, this model was not significant among Latinos and African Americans. Results suggest that academic socialisation practices operate differentially on psychological outcomes for adolescents in different ethnic groups, extending our knowledge of how culture shapes parenting and parent-child relationships. Contains 5 tables.)