“…The study of these dimensions and whether they can be modified is the subject of extensive scholarly literature (Diamond, 1974(Diamond, , 1977a(Diamond, , 1977b(Diamond, , 1980(Diamond, , 1984Diamond, Gregory, Lenney, Steadman, & Talone, 1974;Diamond, Steadman, Hareda, & Rosenthal, 1975;Diamond & Taft, 1975;Hilgard, 1965Hilgard, , 1982bPerry, 1973Perry, , 1977Perry, Gelfand, & Marcovitch, 1979;Perry & Laurence, 1980;Perry & Sheehan, 1978;15 Shor, Orne, & O'Connell, 1962). Perry (1977) and Diamond (1977b) have summarized many relevant considerations, the former arguing that claims for modifiability must be treated with caution, and the latter suggesting that a skill-learning model of hypnotizability is plausible, and that the skill may be improvable.…”