Abstract

This study intented to explore Jung's theory of the relation of psychological types and psychological adjustment, by studying the relationship between psychological types of MBTI and scales of MMPI, especially psychological characteristics on MBTI E-I scale and on MMPI si scale in 476 university students. We classified 4 groups by the MBTI extrovert-introvert scale and MMPI si scales. Those 4 groups are: Group 1 (introverted attitude(I) and socially introversion(si>50)), Group 2(extroverted attitude(E) and socially extroversion(si<50)), Group 3(introverted attitude(I) and socially extroversion(si<50)), Group 4(extroverted attitude(E) and socially introverted(si>50) Simple correlation analysis between MBTI continuous scales and MMPI scales and one way .ANOVA with the anxiety scale and ego strength scale as dependent measures were conducted on the 4 groups. The results were as follows. MBTI E-I scale and MMPI anxiety scale showed signifiant positive correlation. The results of one way ANOVA with the anxiety scale as dependent variable rejected the null hypothesis and the results of multiple comparison classified Group 1 and Group 4 as high anxiety homogeneous group. One way ANOVA with the ego-strength scale as dependent variable rejected null hypothesis and the results of multiple comparison classfied Group 1 and Group 4 as low ego-strength score homogeneous group. These results suggested the following. First, not all introverts experience psychological difficulties. Even the introverts, if socially active, appear to show good psychological functioning. Second, not all the extroverts adapt well psychologically. The extroverts with poor social participation are likely to show poor psychological functioning.