Posthypnotic suggestion, response complexity, and amnesia

Thirty-eight high hypnotisable participants were given a suggestion for eit her a simple or a complex posthypnotic response. The suggestion was given e ither with or without an accompanying suggestion for posthypnotic amnesia. The type of suggestion had an impact on responding: 94% of participants giv en the simple suggestion and 16% given the complex suggestion responded. Th e accompanying presence of amnesia did not have an impact on responding: 46 % of participants with amnesia and 63% without responded; 58% of those who did not receive the amnesia suggestion responded. The findings are discusse d in terms of a model that highlights the interaction of internal and exter nal processes that encourages or discourages posthypnotic responding.