HE ANALYTIC method of studying human behavior provides us with a technique for obtaining information concerning psycho-T logical phenomena of universal occurrence. Among such phenomena are sleeplike states or changes in the state of consciousness, which occur frequently and repeatedly in many cultures and in large segments of our own population as well as in the analytic hour. The very ubiquity of these phenomena and their generally ego-syntonic nature have led us to underestimate their significance and to overlook their psychological implications. This is especially true when no immediate and apparent unpleasant consequences result from their occurrences.These changes in consciousness occur under the most commonplace of circumstances. We are all familiar with the man who goes to the movies, a play, or a concert and promptly falls asIeep. It does not matter how interesting the show is, nor does it matter that his wife tries to keep him awake. The victim of this change in the state of his consciousness cannot keep awake even though he tries. This type of sleepiness, psychological in its origins, is to be distinguished from the type in which a person is simply too fatigued to stay awake and falls asleep from physical exhaustion. The person subject to the first type repeatedly consoles himself with one or another rationalization such as the one utilized by one of my patients; namely, that he has had an especially difficult