Controlling the motivation of learner in their continuing use of the new auto-instructional devices could become a serious problem, since neither the devices themselves nor the performance knowledge they provide seems sufficient to maintain extended participation in the instruction. A selective review of the literature on knowledge of results, praise and reproof, competition, task interruption, and readability suggests techniques for better controlling such participation. Potentially useful applications are discussed, and limited try-out of variations, both within the program and instructional environment, is encouraged. (Author).