“…Four early studies on intellectual performance reported appropriate childlike IQ performances during age-regression procedures (Gakkebush et al, 1930; Kier, 1945; Platonow, 1933; Stalnaker & Riddle, 1932), but four other studies found no evidence for this type of reinstatement (Leeds, 1949; Spiegel, Shor, & Fishman, 1945; Young, 1926, 1940). Later, better controlled studies almost uniformly obtained negative results, with hypnotically regressed subjects performing well above child IQ norms (Gard & Kurtz, 1979; Hoskovec & Horvai, 1963; Roberts, 1984; Sarbin, 1950). Kline (1950) found that 12 highly hypnotizable subjects performed age appropriately on an IQ test when they were regressed to 8, 10, and 15 years of age.…”