The study explored the question of differences between airmen who were assigned to jobs following graduation from formal resident training schools and those who entered a field as on-the-job trainees. Eight career fields which had substantial numbers of airman input as low-ability personnel under Project 100,000 were studied. Evaluations of technical school graduates and directed duty assignees were made in terms of six criteria: a job difficulty index, average task difficulty, number of tasks performed, job interest, self-report of utilization of talent and training, and overall performance ratings. Using the multiple linear regression model, with time in service as a concommitant variable interacting with the training type membership categories (i.e., resident technical course or direct assignment) and with aptitude held constant, tests of the significance in difference between regression lines were made. (Author)