A researcher is measuring the reliability of a substance abuse questionnaire that he created. In order to test the reliability of this questionnaire, he gathers a sample of individuals and randomly divides them into two groups. He administers the questionnaire to both groups and then compares the two groups' responses. If scores for both groups are similar, he can say that he has a reliable measure of substance abuse. What method is he using to measure reliability?
A. test-retest
B. interobserver
C. interrater
D. split-halves
Answer: D
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a. True b. False
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a. true b. false Indicate whether the statement is true or false