Describes the fundamental conflict between the implications of sociobiology and the aspirations of humanists. Sociobiology tends to rationalize and defend special privileges for the powerful few, while humanism stresses equality of opportunity. Journal availability: see SO 507 272. (Author)

Twin children were videotaped hitting an inflated clown figure. Three behaviors (number of hits, intensity of hits, and number of quadrants hit) showed adequate response characteristics, rater reliability, and test-retest reliability. Twin analyses of the three behavioral ratings yielded no evidence of hereditary influence. (Author)