This consists in having the patients to write everything that they remember about their sleep experiences, symptoms and frequency. (Walsleben, 1982, p 936-940). The polysomnograph measures a person’s heart rate, breathing, brain waves and others. This test is done when the person is sleeping. The Minnesota Multiphasic Personality Inventory (MMPI) consists of a questionnaire that contains true and false questions. Although this kind of test can be found, online it would be better if it is given and read by a psychologist that is train to do so. The Beck Depression Inventory and the Zung Depression Scale are also questionnaires that are used to measure specific symptoms of