Increases in hypnotizability as a function of encounter group training: some confirming evidence.

The present study was designed to investigate the effects of encounter group experience on hypnotizability. Thirty-four graduate students were assigned to three experimental encounter groups and one no-treatment control group. The encounter groups varied in the amount of interpersonal contact between group members. Equivalent forms of the Stanford Hypnotic Susceptibility Scale were administered before and after the groups. Significant increases in hypnotizability occurred as a result of encounter group experience. Results were interpreted with regard to the interpersonal nature of group participation and with reference to previous findings. The value of hypnotic susceptibility as a measure of interpersonal behavioral change was considered.