Psychological testing is used for a number of purposes including treatment planning, diagnostic clarification, pre-employment screening, evaluation of cognitive functioning, etc. Testing typically involves interviews, completion of questionnaires, and tests administered by a clinician. The type and number of tests used depends on the referral question that is being investigated. Typically, psychological testing begins with a clinical interview in which the individual being tested is able to explain their symptoms or life circumstances. The next step is administration of a battery of tests designed to answer the specific question of why the person was referred. Following completion of the testing, the results are analyzed and written into a report. For many evaluations, a feedback session where the results are explained is included.