One hundred and thirty one medical students(111males and20females)were requested to reply to the MMPI questions(Japanese version)during and56days after the entrance examination. The greatest difference between the two tests seemed to be that the tension influence was not prevalent at the second test. A cross-table analysis revealed that the items which resulted in the same answers in the two tests are concerned with the F, Sc or Pa scales, whereas the items which led to the different answers are concerned with the Ma scale. By means of factor analyses of both tests based on the validity and clinical scales, the same three factors were extracted: such as self-criticism with irritability, suspicion and aggression, introversive unsociability. The above results showed that the MMPI would be recognized as well defined as the character trait personality inventory.
