The former HEW National Strategy for Youth Development Model was a community-based planning and procedural tool designed to enhance positive youth development and prevent delinquency through a process of youth needs assessment, development of targeted programs, and program impact evaluation. A series of 12 Impact Scales most directly reflect the model's components in psychometric form. Acceptable reliabilities, substantial predictive validity, and consistent correlational structural validity have been found for the Impact Scales with respect to Self-Reported Delinquency (SRD). In order to determine the ability of the Impact Scales, along with age and sex, to predict wanton assault, 1,551 males and females, aged 10-19, comprising a roughly 6% systematic random sample of youth drawn from schools in one county base, completed the Impact Scales. Analyses of results showed that two variables, youth perceived negative labeling by teachers and youth perceived normative peer group pressure towards delinquency, emerged as the primary predictors of self-reported wanton assault. The analyses also showed that 71.3% of the cases were correctly classified. However, 95% of the youths predictively identified in the high wanton assault group were found to be false positives. The high level of false positives in the prediction of violent behavior highlights the ethical/legal dilemmas involved in the prediction of violence for any given individual. (WAS)