A review of the literature in the area of hypnotic dreams suggests that physiological correlates of hypnotic dreams are better established than content characteristics. A study is also reported that examined the content of hypnotic dreams in relation to that of nocturnal dreams and daydreams from the same Ss. Ss were 16 undergraduates divided into deep-trance and medium-trance groups. Deep trance Ss' hypnotic dreams were similar to their nocturnal dreams and different from daydreams on a wide variety of characteristics including length, emotional themes, characters, setting, and amount of distortion. Medium trance Ss' hypnotic dreams were found to fall between their nocturnal dreams and daydreams on most of these measures. (22 ref)