The five to 25-point IQ gains that have occurred in 14 nations in the last 30 years reflect the effects of
a. environment, such as improved education and nutrition.
b. immigration as more diversity occurs in Westernized nations.
c. culture-fair intelligence testing.
d. genetics.
ANSWER: a
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Research has revealed a higher rate of anxiously attached children in Germany compared to the United States. What explanation has been put forth to explain this finding?
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