In order to study the individual's self-concept, Rogers designed a Q-ranking method to distinguish the gap between the ideal self and the real self as an index for diagnosing and evaluating the mental health level. With 80- 100 cards, each card is written with words describing personality, such as "thoughtful", "often anxious" and "able to bear tension", so that the subjects can judge and judge between the most consistent and the most inconsistent extremes according to the grade of 9 (or 7, 1 1). Generally normal distribution. The research proves that if the subjects use this judgment choice twice to describe their true and ideal selves respectively, then the statistical results of the card distribution of the two choices are bound to be different, which is the gap between the true and ideal selves. The calculated correlation coefficient of the two sets of data shows the mental health level of the subjects. The lower the coefficient, the lower the level of mental health.
Studies at home and abroad have confirmed that if the mental health level is significantly improved after psychotherapy, the correlation coefficient between the two egos is also significantly increased. The role of Q classification in diagnosis and curative effect evaluation was confirmed.
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