Researchers publish a finding that drinking more coffee is linked to higher IQ scores. Which of the following conclusions may you draw regarding this correlation?

A. Drinking more coffee will increase your IQ score.
B. Not drinking coffee will not affect your IQ score.
C. A person with a higher IQ score probably drinks more coffee than a person with a lower IQ score.
D. A third variable, such as waking up earlier, probably causes both drinking more coffee and higher IQ scores.


Answer: C

Psychology

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