The questionnaire used in this study contained 25 items selected from the "Awaji-Okabe's Extrovert-Introvert Personality Test", to each one of which was attached a scale (holizontal line) with seven equal interval points. On the left end of the scale was shown a negative extreme choice in a brief sentence, and on the right end a positive extreme one. The subjects were at first asked to mark on any one of the given points or on the middle of two points as to the consequence of introspection of their own present personality traits (reality level). They were then asked to mark on the same scales in the same manner as to the judgment of their future possible aspiration levels of their own personality traits (expectation level). The subjects in this study consisted of the first year students of college (61), the second year pupils of senior-high-school (50), the third year pupils of junior-high-school (55), and the first year pupils of junior-high-school (48). The mean value of the interval (absolute value) between reality- and expectation-levels was calculated with each group of subjects. It was founded that the value was significantly larger in the second year pupils of senior-high-school than in the first year students of college or in the third year pupils of junior-high-school, and that the value of the first year pupils of junior-high-school was smallest. It may be concluded that the differences between reality- and expectation-levels are taken as a kind of index to show some specific aspects of adolescent mind.

III 教育,慶応義塾創立百年記念論文集