A study of response latency in a drill-and-practice task showed that variability in latency measures could be reduced by the use of self-pacing procedures, but not by the detailed analysis of latency into separate components. Experiments carried out on instructional history variables in teaching a mirror image, oblique line discrimination, showed that the most successful procedures were to present the stimulus successively rather than simultaneously with short inter-trial intervals. In evaluating a computer assisted laboratory in statistical inference, it was found that positive attitudinal shifts toward computers resulted from working on a computer terminal. SKOOLBOL-I, a programing language used in psychological experimentation, was evaluated and modified, and basic design work on a second generation language was initiated. An analysis was compled of instructional strategies in terms of automata theory and linguistic models. Plans for the 1969 ONR-LRDC conference on "The Nature of Reinforcement" were completed. Several general papers concerned with concept learning, learning in relation to instructional research, and psychological questions in computer assisted instruction were published. A bibliography is appended. (JY)