The Syracuse University Family Development Research Program (FDRP), which ran from 1969 to 1975, provided support and day care for five years to very deprived families with newborn children. Participants, recruited in the third trimester of pregnancy, were low-education families with an annual income of less than $5,000, 85 percent of which were headed by a single parent with no work history. The major thrust of the intervention program was to influence and have impact on the permanent environment of the child, the family, and the home; and to support parent strategies that would enhance the child's development after intervention ceased. Among the findings of a longitudinal follow-up study, conducted 10 years later, or 65 of the 82 children who completed the program are the following: (1) the FDRP had a positive impact on the children and families who participated in the intervention; (2) high quality early childhood intervention programs prevent the incidence and severity of juvenile delinquency in low-income communities; (3) program families tended to value prosocial attitudes in behavior, education, and family unity; (4) program children expressed positive feelings about themselves, took an active approach to personal problems, and saw schooling as a vital part of their lives; and (5) program girls functioned better in public schools than program boys. Limitations of the FDRP are discussed. Data are displayed in figures and tables. A list of 25 references is included. (BJV)