Sensation-seeking and related personality traits have been linked to both dedliquency and helping behavior. This suggests that certain stimulus-need characteristics are capable of producing both antisocial and prosocial behavior in the same individual. Forty-nine eigth-grade students in a midwest parochial school completed the Junior Eysenck Personality Inventory, the Sensation Seeking Scale (SSS) and a Deliquency Self-report Form. They were placed into either a low- or a high-stimulus condition, tested for a anxiety and sensation-seeking states and a given request to volunteer.As predicted, Deliquency scores were significantly related to the incidencee of volunteering. Volunteers and delinquents, especially drug users, had significantly higher SSS scores than nonvolunteers and nondelinquents. The high-stimulus condition also had a significantly higher proportion of volunteers. Other relationships were found between N and Anxiety, and E and SSS scores,. Results are discussed in terms of interaction of personality characteristics with stimulus conditions, the ‘Robin Hood Syndrome’ and treatment implications.