Research conducted during the two earlier phases of this study showed a definite correlation between certain knowledges, abilities, and aptitudes, and success in the trade machine shop and trade electrical shop programs. On the basis of this and other research and experience, this study sought to develop reliable evaluative instruments and procedures for the prediction of success in these trade areas. After an extensive review of literature and of existing programs and instruments, pilot studies of over 400 pupils were made, once to collect data for the format, structure, and content of an industrial arts checklist, and again to test a structured interview guide and interest inventory. The forms were then reevaluated and revised. The study indicated that non-cognitive, or behavioral characteristics of workers, are not only important to success but may be determining factors. Teachers, supervisors, administrators, and other specialists tend to agree that prediction and selection should take place at the eighth or ninth grade level and that it should be based on non-cognitive as well as cognitive characteristics of the student. Phases I and II are available as ED 019 437 and ED 024 813 respectively. (CD)