This is the final report of the follow-up phase of a project begun in 1962 and designed to analyze the effect of home and maternal influence on the cognitive development of urban Negro preschool children. Contents include: the child's school achievement in the first and second grades; stylistic aspects of children's behavior and their susceptibility to voluntary control and regulation; the child's cognitive development; cognitive behavior of mother and child; the child's language; and, the child's exploratory behavior and interests. A summary of follow-up phase results is included. Extensive appendixes carry samples of questionnaires, interview forms, and procedures for administering and scoring various tasks, rating scales, and tests. For the final report see UD 009 185. [Because of the size of the print of some of the tables, several will not be clear in hard copy reproduction.] (JM)