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Genetics

This study examines the complex interaction between genetics and environmental factors in shaping personality traits, using methodologies such as twin and adoption studies. It explores how genes and environments influence various aspects of personality, including emotionality, sociability, and activity level. The study also highlights the impact of specific genes on behaviors such as antisocial behavior and attachment. The findings suggest that while both genetics and environment play a role, there is no single gene responsible for personality traits, and instead, multiple genes in complex combinations are involved, which can be influenced by experiences. The study raises ethical questions regarding the potential for genetically engineering personality traits in the future.

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Genetics

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  1. Genetics

  2. Nature vs. Nurture

  3. Methodology • Twin studies • Adoption studies

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

  5. Temperaments • Buss & Plomin • Emotionality • Sociability • Activity level

  6. 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

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

  8. Environments • Shared (relatively little effect compared to genes) • Non-shared Within Family Outside Family

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

  10. Implications??? • When we can genetically engineer personality, should we ???

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