Genetics.

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Presentation transcript:

Genetics

Nature vs. Nurture

Methodology Twin studies Adoption studies

Minnesota twin study, Bouchard et al. (combo) identical twins more similar than fraternal

Temperaments Buss & Plomin Emotionality Sociability Activity level

Interaction of Nature & Nurture Environment effects genes PKU MAO and antisocial behavior In males: Low genotype + maltreatment  antisocial beh. High genotype no inc. antisocial beh even with maltreatment Low genotype without maltreat.  slight inc, but not significant

Environments Shared (relatively little effect compared to genes) Non-shared Within Family (birth order, diff. treatment, events) Outside Family (peers, school, events)

Genes effect environment Examples: Emotionality and attachment Physical attractiveness and self-esteem

Genes and Personality No single gene, instead multiple genes in complex combinations and patterns, turned on and off by experiences

Implications??? When we can genetically engineer personality, should we ???

Evolutionary Psychology

Darwin Natural and Sexual Selection Basic assumptions

Example Gender Differences (Men are from Mars...)

Criticisms Post-hoc explanation NOT proof (not entirely fair criticism) Alternative interpretations Does not explain individual differences Is change possible??? Evolution marches on!