The present study examined the correlations among three variables: hypnotizability scores, hours of daydreaming per day, and hours of sleep per night. Previously, Hilgard (1974) and Wilson and Barber (1980) found that greater hypnotizability is associated with daydreaming more frequently and more vividly. Hilgard concluded that daydreaming is a trance-like stare similar to hypnosis irself. Wilson and BarbeP concluded that daydreams and hypnotic experiences reflect not a mental stde but a personality trait: the ability to image vividly with or without a hypnotic pretext. The present study explored a convergent 'state and trait' hypothesis: that both daydreaming and hypnosis are sleeplike states entered most readily by subjects who share the trait of sleeping less. Fifty-six University of Lowell students were tested in small groups. First, on the back of an answer sheet later used for rating hypnotic experiences, subjects answered two questions: How many hours do you usually sleep at night? and How many hours per day do you daydream? Next, the experimenrer hypnotized the subjects with Hilgard and Hilgard's (1975) hypnotic induction procedure and administered the five hyp noric suggestions of the Stanford Hypnotic Clinical Scale (SHCS) : hands moving together, hypnotic dreaming, age regression, post-hypnotic coughing, and post-hypnotic amnesia. Following the hypnotic and post-hypnotic suggestions, subjects rated their responsiveness to each suggestion on a five-point scale created for group administration. On the group rating scale for the Stanford Scale, total scores could range from 5 (lowest hypnaizability) to 25 (greatest hypnotizability). The mean group-score for che 56 subjects was 16.1 (SD = 3.7, range 9-25). The mean amount of reported sleep per night was 7.3 hr. (SD = 1.2, 3.5 to 10.0). The mean amount of daydreaming per day was 1.5 hr. (SD = 1.8, 0.0 to 10.0). Higher hypnotizability scores were significantly correlated both with fewer hours of sleep per night (r = -.30, p < .025) and with more hours of daydreaming per day (r = .27, p < .05). Less sleep was strongly associated with more daydreaming (r = -.53, 0 < .001). These Pearson correlation coefficients are consistent with the hypothesis that both daydreaming and hypnosis are sleep-like states entered most readily by subjects who share the trait of sleeping less. Such a hypothesis is also consistent with one of Barber's earliest (1957) findings: that sleeping subjects and hypnotized subjects respond similarly to suggestions.