According to Sundberg's report, the two psychological tests used most frequently in clinical services are the Rorschach and DAP. The

20 Introduction Bender-Gestalt and Thematic Apperception Test rank third and fourth, respectively, and the fifth most widely used test is the WAIS. A battery of the Rorschach, DAP, and W AIS thus includes the two most frequently used tests, both of which are dl:)pth-projective measures, and the most frequently used surface-objective test.1 This three-test battery is the focus of subsequent discussion, and the history of each test's application to the diagnosis of schizophrenia is briefly reviewed in the following pages.