If a person under deep hypnosis is told he is six years old, his behavior is remarkably like that of a child of six. Is this actually a condition of regression in which all knowledge acquired after the age of six is absent, or is this effective, genuine role playing—an approximation of what might have occurred at the age of six? Ten university students were hypnotically regressed to age six. Drawings, handwriting samples, and Rorschach records were obtained from them during hypnosis and in the waking state. These protocols were compared with some drawings of one subject done when he actually was six years old. The