It has been claimed that hypnosis can induce psychological and physiological regression. Criteria for such regression are the re-establishment of Babinski's sign, changes in EEG pattern, infantile intelligence test performance, and Rorschach response, as well as other experimental findings. This review questions the interpretation of the data suggesting hypnotic age regression. In addition the author points out a possible bias in subject selection that favored those skilled in carrying out imaginative tasks and predisposed to giving a 'good' performance.