The relationship between assessment and psychotherapy

The many arguments, pro and con, about the usefulness and roles of diagnosis in general, and a psychological test battery in particular, can be settled only with reference to particular tests, a particular tester, particular patients, with reference to particular questions, in a particular context. Psychologists need to establish the usefulness of tests in cost-effective ways and demonstrate how tests provide a means of studying the mind. It follows that all psychotherapists should be able to use the tests, as all physiologists should be able to use a microscope. The rule of thumb that therapists should not give tests to their patients is unnecessary, though it is preferable that the tests be given early in the relationship, and that patients have the opportunity to explore their reactions to the procedure. To maximize the usefulness of tests given by someone who is not the patient's therapist, the test report should be designed as a means of persuasion toward therapeutic action more than a passive report of findings. An outline for test report writing is suggested. Finally, the use of tests helps elucidate the many factors that contribute to change through psychotherapy.