Initial Experiments Investigating the Nature of Hypnosis.

INTRODUCTION During the 1923-24 formal Seminar on Hypnosis at the University of Wisconsin under the supervision of Clark L. Hull, the author, then an undergraduate student, reported for the discussion by the postgraduate students of the psychology department upon his own many and varied experimental investigative findings during the previous six months of intensive work and on his current studies. There was much debate, argument and discussion about the nature of hypnosis, the psychological state it constituted, the respective roles of the operator and the subject, the values and significances of the processes employed in induction, the nature of the subjects' responses in developing trances, the possibility of transcendence of normal capabilities, the nature of regression, the evocation of previously learned patterns of response whether remote or recent, the processes involved in individual hypnotic phenomenon and in the maintenance of the trance state, and above all the identification of the primary figure in the development of the trance state, be it the operator or the subject. The weekly seminars were scheduled for two hours each, but usually lasted much longer, and frequently extra meetings were conducted informally in evenings and on weekends and holidays, with most of the group in attendance.