Two separate subject matter areas, which were felt to represent two distinct types of learning situations, were selected for investigation, namely, a kind of logico-mathematical procedure--the transportation technique, and a visual form discrimination task--aircraft recognition. Two separate courses were developed for each subject matter area. One reflected an inductive instructional approach and the other a deductive method. Each of the four courses was administered to between 55 and 60 Navy enlisted men, and 28 measures of aptitude, interest, and personality variables were obtained on each subject. The most significant finding was the significant second order interaction among all three independent variables. The results of this study strongly support the existence of learning styles and suggests that multi-track instruction based on learning styles might be a cost-effective way of enhancing learning. In the supplementary report preliminary plans were formulated for a study to demonstrate that significant effectiveness gains can be achieved through designing training and to match specific learner characteristics. (AUTHOR)