PSYC 100 Chapter Notes - Chapter 2.2: Computer Terminal, Fish Hook, Spatial Memory

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jordan Poppenk

Document Summary

Reviewed 111 studies of iq correlations between siblings from research studies on intelligence from around the world. (meta-analysis) Found that the closer the kinship, the higher the correlation for iq. Researchers used identical twins who have been brought up separately from birth to investigate role of genetics in intelligence. Provides researchers with participants who have a 100% genetic relationship, but grown up in different environments. Based on assumption that any similarity between their iqs, beyond expected by chance, must be due to genetics rather than environment: the minnesota twin study (bouchard et al. Longitudinal study since 1979 with identical twins raised apart (mzas) compared to identical twins raised together (mzts) Determined a heritability estimate of 70% of intelligence while 30% attributed to other factors: scarr and weinberg (1977) + horn et al. (1979) Aim: concentrated on parents who had raised both adopted and natural children. Assumption is all children had same upbringing in same environment with same parents.