Which would provide the strongest evidence that education influences IQ scores?
A) The correlation between number of years of education and IQ is 0.15.
B) Individuals with high IQ scores enjoy reading and doing homework more than individuals with low IQ scores do.
C) When comparing groups of children of the same age who differ in number of years of education, children who have one extra year of education have higher IQs.
D) Generally speaking, children's IQ scores increase significantly during the summer months.

Question

Quizplus · Accepted Answer

Option C indicates a causal relationship between education and IQ, by showing that an increase in education level is related to an increase in IQ. This is stronger evidence than the weak correlation mentioned in A or the unrelated information in B and D.

Which Would Provide the Strongest Evidence That Education Influences IQ