More than a half-century of research aimed at identifying the predictors of
hypnotic responding has been described as investigations of "hypnotiz-abil
ity." Most of that research, however, has disregarded the well-established
findings that (a) people respond to suggestion without being hypnotized alm
ost as much as they do following a hypnotic induction, and (b) nonhypnotic
and hypnotic suggestibility are highly correlated. More recent studies have
provided the first empirical data on predictors of individual differences
in response to the induction of hypnosis. These studies indicate that indiv
idual differences in hypnotic suggestibility can be accounted for completel
y by nonhypnotic suggestibility, expectancy, motivation, and reaction time.
Because the amount of variance accounted for is as great as the reliabilit
y of the hypnotic-suggestibility scale, and because nonhypnotic suggestibil
ity has been controlled, no additional variables are necessary to account f
or hypnotic suggestibility.