As part of the Navy's research on Project 100,000 personnel, several small units of Group IV men were assigned to six regular Class A Schools to determine whether or not they could successfully complete training in essentially unmodified courses. A 19-item questionnaire designed to gather information relative to work performance, potential, and adjustment was mailed to duty stations of the Group IV men and also for a matched sample of non-Group IV men who had attended the same Class A Schools. Results were tested for the significance between the two and an index of overlap was calculated where appropriate. On 13, differences were large enough to be quite improbable on the basis of chance alone; the smallest overlap occurred for the analysis of achieved pay grade. Highly significant differences occurred on such items as length of time to learn job, quality of work, and supervision needed. Smallest differences occurred for items dealing with on-the-job accident rate and how well the man got along with his shipmates. It is recommended that Group IV men not be assigned to ratings that have high reading and/or computational requirements. (author/eb)