The Harvard Group Scale of Hypnotic Susceptibility and related instruments: Individual and group administrations

The Harvard Group Scale of Hypnotic Susceptibility, Form A (HGSHS:A); Telle gen's Absorption Scale (TAS); Dissociative Experiences Scale (DES); and Phe nomenology of Consciousness Inventory (PCI) were administered either indivi dually or in groups. Eighty students from undergraduate Introduction to Psy chology classes were randomly assigned to 1 of the 2 administration conditi ons with 40 students each. Although there was a general trend of differenti al item difficulty levels across the 2 administration conditions, a variety of results (descriptive characteristics, reliability, and validity) paint to the similarity of behavioral behavioral and subjective responses to hypn osis in the 2 conditions. The TAS, DES, and PCI also produced similar resul ts across both conditions of administration.