The construction of a taxonomy of behavioral objectives for the years three, four, and five was the original intent of the project reported. A further intent was that the taxonomy should distinguish what were reasonable objectives for children of differing socioeconomic (SES) levels and ethnic backgrounds, with particular reference to the advantaged (ADV) and disadvantaged (DADV) populations and to white (anglo), Negro, and other groups. To determine the feasibility of constructing such an empirical taxonomy, the studies were submitted to two kinds of analysis, the first at the close of the abstracting phase and the second at the close of the data summary phase. It can be inferred that research and development activities in early childhood have proceeded much too slowly to keep pace with application demands. The real failure is less in the technology or theory of early childhood development than it is in the coordination of investigative efforts. This state of knowledge made impossible the accomplishment of the original highly differentiated empirical taxonomy. It was possible, nevertheless, by combining studies into grosser demographic subgroupings to prepare a substantial set of behavioral objectives in the psychomotor, cognitive, and affective domains for five year olds. (For related documents, see PS 005 444-445 and PS 005 447-448.) (Author/CK)