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

Question

Quizplus · Accepted Answer

The researcher is using the split-halves method to measure reliability. This method involves dividing a test into two parts and comparing the results of the two halves to assess the consistency of the test's outcomes.

A Researcher Is Measuring the Reliability of a Substance Abuse