1. The Thurstone Personality Schedule in Chinese translation was given orally and individually to 617 Chinese male subjects including 127 medical patients, 224 neurological patients, 62 applicants for non-professional work in the hospital of Peiping Union Medical College, 101 mental patients of the Peiping Municipal Psychopathic Hospital, and 103 addicts of the Peiping Municipal Treatment Center for Drug Addiction in the years 1933-1935. 2. The mean personality score for the total cases was found to be 51.82. The score of the neurological patients was significantly higher than that of the medical patients, applicants, and the addicts. The score of mental patients was significantly higher than applicants, and the scores of addicts and medical patients were significantly higher than applicants. 3. When the subjects were regrouped according to their occupation, the scores of the student, teacher, and clerk groups are significantly higher than that of the coolie group. The score of the teacher group showed an excess over that of the officers. 4. When the patients were grouped according to medical diagnosis, the psychopathic, both with and without demonstrable "organic" basis, and the schizophrenic groups were significantly higher than the presumably adjusted group. The schizophrenic group and psychopathic patients without demonstrable "organic" basis showed a significantly higher score than that of the addicts and manic patients after the period of their excitement. The coefficient of contingency between clinical diagnosis and the neurotic score was .47. 5. A list of the most common and the least common traits is determined (Table 5). The most common traits are items 16, 23, 49, 62, 77, 95, 121, 188. The least common traits are 55, 56, 97 134 149, 176, 204, 217. 6. The contradictory answers of the applicants was 70.77 per cent, addicts 64.18 per cent, mental patients 52.79 per cent, neurological patients 45.79 per cent, and the medical patients 45.67 per cent. 7. By applying the criterion of Internal Consistency the diagnostic value of each item was determined. The most diagnostic items (Table 8a) are found to be 52, 80, 127, 136, 138, 139, 152, 153, 177, 178, 197, 202, 206. The least diagnostic items are 18, 49, 62, 91, 95, 121, 183, 188, 192. 8. A high proportion of similarity was found in the most diagnostic items between the Americans and Chinese. This fact points to the usefulness of the schedule among the Chinese. 9. It seems that this schedule cannot be applied diagnostically with certainty to psychotic patients. It may still predict trouble but not the type of mental illness. 10. The correlation between the number of years of schooling and the neurotic scores based on 321 cases is .31±.033. The correlation between the IQ and the neurotic score of 99 cases was found to be .028±.071. [ABSTRACT FROM AUTHOR]