For at least half of the twentieth century, psychology and the other mental health professions all but ignored the significant adaptive pos sibilities of the human gift of imagery. Our capacity seemingly to duplicate sights, sounds, and other sensory experiences through some form of central brain process continues to remain a mysterious, alma st miraculous skill. Because imagery is so much a private experience, experimental psychologists found it hard to measure and turned their attentian to observable behaviors that could easily be studied in ani maIs as well as in humans. Psychoanalysts and...