Nine college students who had taken an intelligence test at the age of eight or nine, and who were found to be hynotizable by the author, took the same intelligence test over again under two different conditions: in a state of hypnotic regression to the approximate age at which the test was originally taken, and in a waking state with instructions to imitate the performance of an eight or nine year old on the test. Comparisons of the two college-age records (in and out of hypnosis) with the original record indicate: 1, under both experimental conditions, consistent overestimation by several years of the level of performance of an eight or nine year old; 2, a consistently closer approximation to the original level of performance when the subject was hypnotically regressed than