A psychologist investigated the relationship between SAT score and academic succ
ID: 3077959 • Letter: A
Question
A psychologist investigated the relationship between SAT score and academic success. She determined that students with high SAT score were more likely to experience academic success. She was very excited about her results and shared them with you. You quickly pointed out to her that students who have high IQ's tend to have high SAT scores and also tend to experience academic success. You explain that the relationship between SAT score and academic success might be due to the fact that both academic success and SAT are related to IQ. Since the psychologist has information concerning IQ scores for her sample, she decides to do some additional analyses which control for the effects of IQ, what would you recommend?
Explanation / Answer
Partial Correlation is the correct one because it is a statistical technique that is used to control for the effects of confounding variables. For our example, the procedure would statistically equate everyone at the same IQ level and then produce an estimate of the correlation between academic success and SAT score. The effects of IQ are said to be "removed," leaving an estimate of correlation that is not affected by IQ levels. If the correlation remains high, then we could conclude that academic success is related to SAT scores. If the correlation lowers, we would conclude that the correlation between SAT and success was the result of IQ levels.
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