Studies exploring the correlations between IQ scores of individuals on the basis of their degree of genetic relationship have found that
a. identical twins reared together show lower correlations than identical twins reared apart.
b. identical twins reared apart show higher correlations than fraternal twins reared together.
c. siblings reared together show lower correlations than siblings reared apart.
d. siblings reared apart show higher correlations than fraternal twins reared apart.
Answer: b. identical twins reared apart show higher correlations than fraternal twins reared together.
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Which theory of motivation focuses on processing and understanding information?
a) learning b) biological c) cognitive d) optimum-level
Based on the heritability studies cited in the text, the appropriate conclusion to draw is that:
a. genes are important in physical development, but not in cognitive and personality development b. genes are important in physical and cognitive development but not in personality development c. genes play only a minor role in human development, regardless of the domain in question d. genes play a significant role in human development of a wide range of human traits and behaviors