What does the Flynn effect refer to?

a. The increase in average IQ test scores over decades
b. The decrease in average IQ test scores over decades
c. The higher IQ test average scores for Asian Americans compared to European Americans
d. The lower IQ test average scores for African Americans compared to European Americans

Answer: A

Rationale: After reviewing many similar studies that were reported since 1932, Flynn and other researchers have estimated that the averages increase about 1 point every three years.