Sam and Charles are discussing the definition of reliability. Which of the following statements accurately illustrates reliability?
A. An IQ test is effective in predicting the academic performance of both males and females.
B. Scores on an IQ test are not affected by mood.
C. Scores on two different intelligence tests are highly correlated.
D. When an IQ test is administered to the same person repeatedly, the results do not differ.
Answer: D
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