Suppose a psychologist believes that people are on average actually smarter today then people a couple of generations ago. Which of the following explanations is most likely to be cited for the rise in IQ scores?
A) easier intelligence tests
B) the use of culture-free tests
C) more experience taking tests
D) early childhood educational programs
Answer: D
Rationale: Factors such as improved nutrition, health care, and early childhood educational programs may have increased the actual cognitive abilities of people compared to previous generations. The other explanations given could explain the increase in intelligence test scores, but would not lead to an actual increase in intelligence.
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