PSY230H5 Lecture Notes - Lecture 18: American Psychological Association, David Batty, Fluid And Crystallized Intelligence
Document Summary
Performance on diff intellectual task are positively correlated (vocab, digit memory, spatial ability, etc. ) Factor analysis of various tasks shows on general factor (g-factor) Intelligence profiles (diff rank order on diff tasks, linguistic, logical-mathematical, spatial, boidly0kinesthetic, musical, + personal intelligence) Hierarchical model of intelligence: different types of intelligence. Correlations between adult twin pairs: evidence for environmental effects: adoption studies. Adoption from low sees families into middle-class families --> increased iq by 12 points (lucurto, 1990) Iq of adopted children more similar to biological parents than to adopted parents. Effects of nature remain, effects of nurture become weaker as children grow up (harris: conclusion. Heritability of iq after late adolescence is about 0. 75. No effect of shared environment in adulthood. For children shared environment has an effect (>20%: new (2012)! For most children (90% of the pop), breast feeding was a predictor of higher iq (~7 points) For these children, breast feeding was also a predictor of mothers" iq (~8 points)
