Investigations of interracial adoption and IQ have revealed that African American children reared in economically advantaged White households showed an overall increase in IQ relative to the national average for African American children.This finding supports the proposal that observed differences in IQ scores between various racial and ethnic groups:
A)result entirely from genetic factors
B)result entirely from biases that exist in current intelligence testing procedures
C)may result from environmental differences between the groups
D)are a result of poor parenting practices

Question

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The finding that African American children adopted into economically advantaged White households showed an increase in IQ suggests that environmental differences between racial and ethnic groups may play a role in IQ scores. This argues against the idea that IQ differences are entirely due to genetics (choice A) or biases in testing procedures (choice B). Additionally, the fact that the increase in IQ was associated with adoption into economically advantaged households suggests that poor parenting practices (choice D) are not likely the primary explanation for observed IQ differences between racial and ethnic groups.

Investigations of Interracial Adoption and IQ Have Revealed That African