PSYC 3325 Chapter Notes - Chapter 6: Master Race, Human Genome, Behavioural Genetics
2 Apr 2019
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Document Summary
Controversy about genes and personality: researchers attempt to determine the degree to which individual differences in personality are caused by genetic and environmental differences. If a personality characteristic is highly heritable, family members with greater genetic relatedness should be more similar to each other: family members who share the same genes also typically share the same environment, results are never definitive. If fraternal twins are just as similar to each other as identical twins are, then the characteristic is not heritable. Identical twins tend to dress more alike, spend more time together, and have more friends in common, but these factors do not cause them to be more similar in personality than they are to begin with. Attitudes and preferences: 59% heritability for traditionalism (attitudes favoring conservative values, moderate to significant heritability of values, significant heritability for occupational preferences (desire for competition and wealth, zero heritability for religiousness during adolescence, 44% heritability in adulthood.
