PSYCH211 Chapter Notes - Chapter 4: Behavioural Genetics, Twin Study, Distant Relatives
20 Mar 2013
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Chapter 4: psych 211 january 26, 2012. Chapter 4: biology and behavior: heritability and behavioral genetics. : study shows that iq is 67% a matter of genetics. 2 premises: to extent that genetics is important: genotypic similarity --=> phenotypic similarity. People who are genetically similar have similar traits: to the extent that the environment is important: similar environment phenotypic similarity. People who grew up in the same environment has the same traits. : performance of the kids are clustered in day cares; kids in one day care fail severely or in one day care where kids get high scores. Look at some trait e. g. : smart, sociable, aggressive, psychotic, height. Problem: families may share or differ in environments. Look at correlations between: adopted person and adopted family (e. g. : parents, siblings, adopted person and biological family (e. g. : parents, siblings) Look at correlations between: mz twins, dz twins. If mz twins show stronger correlations, importance of genetics.
