The Waterloo-Stanford Group C (WSGC) scale of hypnotic susceptibility: normative and comparative data.

The Waterloo-Stanford Group C (WSGC) hypnotic susceptibility scale was developed as a substitute for the individually administered Stanford Hypnotic Susceptibility Scale, Form C (SHSS:C). A first investigation with WSGC reports normative data on 259 subjects, and the results indicate that it is comparable in most important respects to the norms of SHSS:C. A second investigation directly compared WSGC and SHSS:C in a counterbalanced design on 65 subjects, and the two scales correlated .85. It is argued that, when used as a follow-up to the Harvard Group Scale of Hypnotic Susceptibility, Form A, WSGC provides a valid criterion of hypnotic ability.