The first purpose of this study was to make a check-list by which phychological-competitive ability of athletes can be diagnosed. A questionnaire was administered to 236 male and female athletes who participated in the National Athletic Games in October, 1986. Factor analysis was applied and five factors were named as follows; ability to increase a competitive motivation, ability to stabilize mental states, ability of strategy, cooperative ability and ability to achieve one's best.
　The second purpose was to clarify the method and effectiveness of mental training based on a combination of relaxation training by skin temperature biofeedback and image training. Seven junior swimmer were trained fifteen times in a month. We concluded that this mental training had desirable effects on the training of relaxation and image.

DESCENTE SPORTS SCIENCE Vol.8/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE