“…These various measurements may be reliable, but their significance is questionable. There are many different quantitative methods for measuring individual differences in responsivity to hypnosis, such as the Barber Suggestibility Scale (Barber, 1965), the Stanford Hypnotic Susceptibility Scales (Hilgard, 1965;Weitzenhoffer & Hilgard, 1959;Weitzenhoffer & Hilgard, 1962), the Eye Roll Sign and the Induction Score of the Hypnotic Induction Profile (Spiegel & Spiegel, 1978;Spiegel, Aronson, Fleiss & Haber, 1976), and various self-rating procedures (Frischholz, E.J., Tyron, W.W., Fisher, S., Maruffi, B.L., Vellios, A.T. & Spiegel, H., 1980;Tart, 1979). This makes any kind of standardization problematic because scores on different tests, while internally consistent, do not intercorrelate high enough (range of r's = .20 -.…”