The second phase of a project designed to further analyze the factors contributing to the task difficulty in Naval jobs and to determine the optimum training methods for these jobs is reported. A telephone survey of experts attempted to gather data regarding task difficulty. The results of the survey were inconclusive. As a result of the problems experienced in conducting the survey, an overall plan was developed to guide subsequent investigations in which task difficulty is either controlled or manipulated. An experiment was conducted to ascertain whether cartoons, the accompanying text, or a combination of the two were responsible for the facilitating effect of imagery found in an earlier experiment. The results of this experiment failed to validate the findings of the earlier one in that no such facilitating effect was found. A second experiment was therefore conducted, using paper and pencil rather than a hardware simulation of the task. The results of this experiment also showed no evidence that imagery improves performance. A third experiment investigated the influence of training task fidelity of simulation on transfer performance. The data from this study indicated that stimulus and response fidelity has little effect on response time or accuracy. (JY)