Now let's perform a thought experiment. I would like to ask you to imagine that the Harvard Group Scale is being given to a class of introductory psychology students at the American University of Beirut, let us say, when a person dressed in a police uniform bursts into the room and says in a loud, commanding voice, "The city is under biological attack, and a germ cloud is headed this way. Take refuge in the basement immediately and await further instructions!"
Even if such an announcement is a hoax (i.e., a cleverly-designed suggestion) thought up by a dissident student organization to disrupt the orderly running of campus activities, if it were to be conducted in a sufficiently convincing manner, everyone in the class -- including the instructor -- would probably dash for the exits and head for the nearest underground shelter. What happeed to the individual differences in suggestibility which the Harvard Group Scale was supposed to measure? They simply vanished, as everyone took flight!
A high degree of responsiveness to the impostor's suggestions would occur regardless of how an individual student might have scored on the suggestibility test which was currently underway. Notice also that the subjects would probably have been totally involved in the content of the impostor's suggestions: trembling, feeling frightened, weeping, crying out in alarm, and so on. In human society, suggestion appears to be causally related to experiences as diverse as falling in love,, coming under the sway of a totalitarian dictator,being saved in a revival meeting,or turning into an animal (transmogrification),as practiced in Native American culture. Individual differences in responsiveness, if they exist. do not seem to attract much attention.,
Regardless of whether the induction takes you up, down, or sideways, you're hypnotized if you think you are! I use this kind of suggestion-enhanced experience in my psychology practice every day in order to facilitate the acceptance of subsequent therapeutic suggestions which are accepted more easily because the induction has made them more credible..
Lynn, S. J., & Kirsch, I. (2006).Essentials of clinical hypnosis: An evidence-based approach.Washington, DC: American Psychological Association.