Gravity anomalies in the galapagos islands area.

1. H. Merskey and F . G . Spear, Pain : Psychological and Psychiatric Aspects (Balliere, Tindall and Cassell, London, 1967), pp. 71-87; R . A. Sternbach, Pain: A Psychophysiological Analysis (Academic Press, New York, 1968), pp. 59-77. 2. R. A. Sternbach, S. R. Wolf, R. W . Murphy, W. H . Akeson, PsychosomiJlics 14, 52 (1973). 3. R. A . Sternbach, R. W . Murphy, G . Timmermans, J. H . Greenhoot, W . H . Akeson, in Advances in Neurology, vol. 4, Pain , J. J . Bonica, Ed. (Raven, New York, 1974), pP. 281-288. 4 . G . M . Smith, L. D . Egbert, R. A. Markowitz, F . Mosteller, H. K . Beecher, J. Pharmacol. Exp. Ther. 154, 324 (1966); G. M . Smith, E . Lowenstein, J. H. Hubbard, H . K. Beecber, ibid. 163, 468 (1968); G . M. Smith and H. K. Beecher, c/in. Pharmacol. Ther. 10, 213 (1969). 5. N. H . Nie, D . H . Bent, C. H. Hull, Statistical Package for the Social Sciences (McGraw-Hili, New York, 1970), pp. 208-244. 6. T. S. Szasz, in Pain, A. Soulairac, J . Cahn, J . Cha rpentier, Eds. (Academic Press, New York, 1968), pp. 93-113; R. A. Sternbach, in Advances in Nellrology, vol. 4, Pain, J . J. Bortica, Ed. (Raven. New York, 1974), pp. 423-430. 7. B. B. Wolff, J . Abnorm. Psychol. 78, 291 (1971). This pain endurance factor was sigrtificantly correlated with successful outcome of painful physical rehabilitation in chronic arthritis patients. 8. Factor 4 includes the highest pain estimate loadings, is associated with the social introversion scale of the MMPI with scores in the direction of extraversion, and to a lesser extent with the depression scale . It is thus clearly a pain complaint factor [see M. R. Bond, Br. J. Psychiat. 119, 671 (1971». Factor 5 is specific to the scores on the Health Index, factor 6 is a sex-related factor, and factor 7 is a general neuroticism factor from the MMPI scales. 9. We thank Dr. Lowell H. Storms for his belpful comments and suggestions.