The purpose of this study was to investigate the repetiton effect of Uchida-Kraepelin Psychodiagnostic Test, when administered annually at school. To clarity the repetition effect performance of junior high school students was compared for three consecutive years. The increase in the amount of work done waslO.1% for the second year, and 18.l% for the third, when compared with the first year trial. To investigate the repetition effect at different test intervals, changes in the amount of work over trials at three intervals, 1month, 6 months, and 12 months, were examined. The repetiton effect was strongest at the interval of 1month,and was weakest at l2months.The finding suggested that when interpreting test results,changes in performance could be important, but previous experience and when it had been should also be taken into account.
Key words: Uchida-Kraepelin Psychodiagnostic Test,the
effect of test repetition,the amount of work,annual
administration at school