Psych 105-ucsb-fall-2011-lecture 11-ch 12_Personality_parents_peers

Psych 105-ucsb-fall-2011-lecture 11-ch 12_Personality_parents_peers

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1 Personality Development Click here Overview Personality – very brief introduction What contributes to individual differences in personality? Behavioral genetics as a source of evidence. What are the environmental factors? Example: research on socialization by parents; parenting style. Behavioral genetics evidence undermining evidence for parental influences on personality: Do parents really matter? If parents don‟t matter, who does? Personality (very [very] brief introduction): “Apparently, you can tell a lot about someone‟s personality from what they are like… ” -- Harry Hill Theme: individual differences Stable across time, measured via questionnaires tapping various dimensions (introversion, extroversion, etc.). Early temperaments are first indications… emerging at just a few weeks of age . Individual differences: using “behavioral genetics” to determine sources of variation Up to this point, we have talked about biology and environment as they relate to common human abilities (e.g. the capacity for language A different question we can consider is the extent to which individual differences between people are the result of them having different genes or different environments. Methods in behavioral genetics 1: twin studies: Identical (monozygotic - MZ) twins share 100% of their DNA Fraternal (dizygotic - DZ) twins share only 50% of their DNA Different levels of genetic similarity Equal environmental similarity Logic: Differences in similarity between sets of Identical twins and sets of Fraternal twins is due to genetic factors i.e. if Identical twins more similar, due to more similar genetics
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Psych 105-ucsb-fall-2011-lecture 11-ch 12_Personality_parents_peers

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