For more than half a century of hypnosis research (MacHovec, 198813;Schultz, 1922), there have been disquieting reports of so-called "negative effects" during and after hypnosis: unwanted or untoward reactions that degrade hypnotic involvement or eventuate in deleterious psychological sequelae. The spectrum of reported negative effects has encompassed minor complaints such as headaches, dizziness, or nausea (Coe & Ryken, 1979); serious reactions such as psychosis (Kleinhauz, Dreyfuss, Beran, Goldberg, & Azikri, 1979) or suicide (West & Deckert, 1965); transient symptoms lasting only a few minutes (MacHovec, 1987); and chronic conditions lasting for months (Kleinhauz & Beran , 1984). The range of negative effects includes physical pain or discomfort (Hilgard, 1974); anxiety or panic (Judd, Burrows, & Dennerstein, 1985); depression (Kleinhauz & Eli, 1987); difficulties in awakening from hypnosis (Orne, 1965); and unexpected reactions to an inadvertently given suggestion (Levitt & Hershman, 1963). MacHovec ( 1988a) suggested the following definition of hypnosis "complications": "unexpected, unwanted thoughts, feelings or behaviors during 95