This report establishes a definition of the phenomenon of adolescence against which to consider research needs and reviews current research issues in adolescence. Research related to adolescence conducted by federal agencies in fiscal year 1973 is described in terms of both the overall research picture and the particular nature of the work of each agency. Anticipated adolescence research plans of each agency for FY '74 are outlined, and a summary and analysis of these plans is compared with the statement of research needs as previously presented. Appendices include a table listing detailed agency plans for research in FY '74, and summaries of special interest group reports on work experience, marker variables, and vocational and career education programs. (MG)