Previously unheard-of manifestations of hypnosis can be found by simply informing subjects beforehand that such manifestations are expected in hypnosis, that is, are a part of the collective cognitive imperative about the matter. For example, an introductory psychology class was casually told that under hypnosis a subject's dominant hand cannot be moved. This had never occurred in hypnosis in any era. It was a lie. Nevertheless, when members of the class at a later time were hypnotized, the majority, without any coaching or further suggestion, were unable to move their dominant hand. Out of such studies has come the notion of the 'demand characteristics' of the hypnotic situation, that the hypnotized subject exhibits the phenomena which he thinks the hypnotist expects.5 But that expresses it too personally. It is rather what he thinks hypnosis is. And such 'demand characteristics,' taken in this way, are of precisely the same nature as what I am calling the collective cognitive imperative. Another way of seeing the force of the collective imperative is to note its strengthening by crowds. Just as religious feeling and belief is enhanced by crowds in churches, or in oracles by the throngs that attended them, so hypnosis in theaters. It is well known that stage hypnotists with an audience packed to the 5 This is one of the important ideas in the history of hypnosis research. See the papers of Martin Orne, particularly, 'Nature of Hypnosis: Artifact and Essence,' Journal of Abnormal and Social Psychology, 1959, 58: 277-299; in this connection David Rosenhan's important and sobering, 'On the Social Psychology of Hypnosis Research' in J. E. Gordon, ed., Handbook of Clinical and Experimental Psychology. 386 Vestiges of the Bicameral Mind in the Modern World rafters, reinforcing the collective imperative or expectancy of hypnosis, can produce far more exotic hypnotic phenomena than are found in the isolation of laboratory or clinic.

• isolation
• time
• nature
• force
• ideas
• psychology
• bicameral mind
• history
• hypnosis
• collective
• belief
• matter
• note
• situation