The former HEW (Health, Education, and Welfare) National Strategy for Youth Development Model proposed a community-based program to promote positive youth development and to prevent delinquency through a sequence of youth needs assessments, needs-targeted programs, and program impact evaluation. HEW Community Program Impact Scales data obtained from a census tract sample of over 6,000 youths, ages 12 to 19, were factor analyzed to assess their conformity to the behavioral model. For the most part, theoretical dimensions and their predicted correlational directions emerged as four factors provisionally named: (1) negative labeling; (2) social integration versus social estrangement; (3) norm adherence; and (4) parental rejection. Social alienation variables unexpectedly loaded three factors rather than one. The findings provide strong structural validation for the HEW Youth Development Model and Impact Scales. (Author/JAC)