The mental features of nine 47, XYY males and six 47, XXY males found among Japanese juvenile delinquents were examined. The results of intelligence tests suggested a slight impairment among 47, XYY and 47, XXY males. The psychiatric interviews and the psychological tests revealed that 47, XYY males had a high activity level while 47, XXY males had a low one. Analyses of the offense type and psychophysiological features supported these findings. As the activity level is considered to be largely determined genetically, the extra Y is suspected to be responsible for the high activity level and the extra X in males to be responsible for the low activity level.

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Volume33, Issue1

March 1979

Pages 29-34

Personality Traits of 47, XYY and 47, XXY Males Found Among Juvenile Delinquents

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Personality Traits of 47, XYY and 47, XXY Males Found Among Juvenile Delinquents

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