PSYC 365 Lecture Notes - Lecture 2: Surrogacy, Larry Walker, Potassium Chloride
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Overestimating extent of biological variables determining behavior. At least one extra y, sometimes yyy. Typically taller than normal, have quite large teeth and severe acne during adolescence. Fertile but often have very low sperm counts. Once thought to be of subnormal intelligence and prone to violence and aggression. (cid:498)criminality syndrome(cid:499) Extra y chromosome causes increased aggression. But he wasn(cid:495)t xyy, he was xy but the story was widely believed. Or social factors that contribute to increased aggressiveness. Witkin et al. (1976) [research on supermales and klinefelter males] N= 4, 139 men; 12 xyy and 12 xxy men age 28-32, born in copenhagen and height was in top 15 percentile (tested 4000 men) Found: chromosomal composition wasn(cid:495)t highly related to probability of committing a crime, neither was height. The factors they found that were related to criminality were low ses and for every group of men, lower intelligence scores were more likely to have a criminal record.
