PSYC 332 Lecture Notes - Lecture 9: Twin, Heritability, Extraversion And Introversion
Document Summary
Why are siblings so different: exploring genetic versus family influences on personality. Important questions about nature vs. nurture: richard thinks that his high school greatly influenced his personality. Questions: what role do genetics play in the development of personality traits, what aspects of the environment are important in the development of personality traits, gene vs. environment. Important shared environmental facts shared by you and your siblings. Age 18 pictures: heritability of height = 90%, weight, richard and his brother, they were always very similar, even their speech, they also have very similar cognitive abilities (similar iqs), but their personality is very different. Easy vs difficult: seen very early and biologically based. Richard was a very good boy: neuroticism. Richard > roland: roland is very low on neuroticism, extraversion. Roland would always be the one leading the group: openness, agreeableness. Richard > roland: richard always thought he was more agreeable than roland, conscientiousness.
