The effect of boredom proneness as measured by the Boredom Proneness Scale (R. F. Farmer & N. D. Sundberg, 1986) on college student's psychosocial development was investigated via the Student Developmental Task and Lifestyle Assessment (SDTLA; R. B. Winston, T. K. Miller, & J. S. Prince, 1995). Low boredom-prone students had significantly higher scores on the following SDTLA measures: career planning, lifestyle planning, peer relationships, educational involvement, instrumental autonomy, emotional autonomy, and salubrious lifestyle. Gender differences on boredom proneness and psychosocial development measures are discussed.