In connection with some criticisms on the multiple choice method, a typical group method of the Rorschach test, an attempt was made to increase its reliability and validity and to make its application to the clinical field more effective by adopting the ranking method as presented. by Eysenck H. J.
While Eysenck merely altered a procedure from the multiple choice method to the ranking method in order to increase the reliability, the present study was intended to comprehend more directly the psychological mechanism which takes place in selection of responses prepared for each stimulus card ; namely an effort was made, without losing the original purpose of the Rorschach test, to grasp the psychological mechanism of perception and response to a stimulus card, for the personality diagnosis. The ranking method is con-sidered as more dynamic for the item analysis than the multiple choice method which is merely to analyze the response items selected by a subject.
The results of the present study are summarized as follows :
1) The subjects consisted of a normal group, a schizophrenic group, and a delinquent group. Since one percent of significant difference was found between the mean scores of each group, the ranking method might be considered as a valid tool for the clinical diagnosis.
2) The reliability of the test was measured by the retest method, and a relatively high reliability was obtained and thus it was shown that the rating was not arbitrary.
3) No influence of the intellectual and the chronological factor on the test score was found.
4) Since some response items are not appropriate for the clinical diagnosis, a further study should be made to improve about this point.