Chapter 3 - 1 1 Nature, Nurture, and Human Diversity...

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Unformatted text preview: 1 1 Nature, Nurture, and Human Diversity Chapter 3 2 Behavior Genetics: Predicting Individual Differences Behavior Geneticists study our differences and attempt to determine the effects of heredity and environment. 3 Genes: Our Codes for Life Chromosomes containing DNA ( deoxyribonucleic acid ) are found in the nucleus of every cell. 4 Genes: Our Codes for Life Segments within DNA consist of genes that make proteins that determine our development. 2 5 Simple heredity : 6 Twin and Adoption Studies Many study the effects of heredity and environment on sets of twins -- identical and fraternal. 7 Identical twins more similar in: • Extraversion • Neuroticism • Abilities • Traits • Interests 8 Separated Twins A number of studies compared identical twins reared separately from birth, or close thereafter, and found numerous similarities. Interests, Fears Brain Waves, Heart Rate Abilities, Attitudes Personality, Intelligence Separated Twins 3 9 Biological Versus Adoptive Relatives Adoption studies suggest that adoptees tend to be different from their adoptive parents and siblings. 10 Temperament and Heredity Temperament refers to a person’s stable emotional reactivity and intensity. Identical twins express similar temperaments, suggesting heredity predisposes temperament. 11 Nature and Nurture Some human traits are Fxed, such as having two eyes. However, most psychological traits are liable to change with environmental experience....
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This note was uploaded on 04/07/2008 for the course PSYCH 100 taught by Professor Cave during the Spring '08 term at UMass (Amherst).

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Chapter 3 - 1 1 Nature, Nurture, and Human Diversity...

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