The document describes a project (with an initial sample of 384 Ss and a followup sample of 200 Ss) to develop improved measures of occupational and social functioning of mildly retarded young adults in their postschool environments. Section I provides background information on the project and a project overview. The first part of Section II describes the major instrument development activities completed in the pilot year. Other parts of Section II focus on the selection and composition of the several testing samples, data collection procedures, and examination and revisions of the rating scales and analyses of the interrater and stability of these ratings. Section III looks at the status of the mildly retarded young adults in terms of their employment and social living activities, goals, and expectations as reported in the interview questionnaire. A fourth section reports the keying procedurs for the Forced Choice Inventory (FCI) and the interrelationships among the FCI scores and indices of Ss' vocational achievement and postschool socialization. changes and constancies in FCI statement preference scores over a followup period are reported. A final section offers a recapitulation of findings particularly as they relate to broader considerations of the needs and problems of young mildly retarded adults and to improvement of training and habilitation services for this population. Cited among findings are that approximately half of the Ss living at home indicated dissatisfaction with their present living arrangements and nearly all said that they wanted to be on their own; that the unemployment rate for the Ss' parents was about double of that for the general population; that a problem cited by respondents as relating to employment was transportation, and the ability and independence in getting around; and that data supported the appropriateness of the FCI format and content for administration to mildly retarded populations. Appendixes include instructions for administration of the Forced Choice Self Description Inventory, guidelines and a sample copy of the general information questionnaire used for the fourth interview of the community adjustment followup sample of former special education students, a multiple criteria rating scale of community adjustment, a table of occupational levels assigned to reported employments, and copies of generalization keys for male and female versions of the FCI. (SBH)