The Group Scale of Hypnotic Ability: Manual and Response Booklet Russell M. F. Hawkins, University of South Australia Lienne Wenzel, University of South Australia The manual and response booklet for the Group Scale of Hypnotic Ability (GSHA) are presented.  The GSHA is a revision of the Harvard Group Scale of Hypnotic Susceptibility, Form A (HGSHS:A; Shor and Orne, … Continue reading MAY 1999, VOLUME 27, NUMBER 1, Abstract 3