Development of the Group Scale of Hypnotic Ability:  A Revision of the Harvard Group Scale of Hypnotic Susceptibility Russell M. F. Hawkins, University of South Australia Lienne Wenzel, University of South Australia The Group Scale of Hypnotic Ability (GSHA) was developed as a shorter substitute for the Harvard Group Scale of Hypnotic Susceptibility (HGSHS:A) on which it is … Continue reading MAY 1999, VOLUME 27, NUMBER 1, Abstract 2