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Juvenile delinquents, identified by their scores on the Minnesota Multiphasic Personality Inventory (MMPI) received training under one of three different protocols for 1 hour three times weekly for a period of 6 months. Group I students received training in the traditional Korean Martial Art of Tae Kwon Do, Group II students received training in a “modern” version of the martial art which did not emphasize the psychological/philosophical aspects of the sport as the Korean version did, and group III students served as a control group for contact with the instructor and physical activity. Group I students showed decreased aggressiveness, lowered anxiety, increased selfesteem, increased social adroitness, and an increase in value orthodoxy, as indicated by before-and-after scores on the Jackson Personality Inventory (JPI), in addition to normal MMPI scores at the completion of the study. Group II students showed an even greater tendency toward delinquency on the MMPI than they did at the beginning of the study, a large increase in aggressiveness, and generally opposite effects of Group I on the JPL Group Ill students showed no notable differences on any of the personality measures. These data suggest that training in the traditional martial art of Tae Kwon Do is effective in reducing juvenile delinquent tendencies.

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The rate of accumulation of 3,4-dihydroxy-phenylalanine following decarboxylase inhibition and of homovanillic acid following probenecid treatment were significantly decreased in streptozotocin-diabetic rats. These changes were observed in both the striatum and limbic forebrain. The Bmax for [3H]spiroperidol receptor binding was significantly increased in both brain regions. All of these neurochemical changes were reversed by insulin replacement therapy. Whether these neurochemical changes are attributable to chronic hyperglycemia or some other aspect of the diabetic state is not known.