Professor Plum devises a new personality test and administers it to a large and representative group of people, finding a wide distribution of scores on the test. Two months later he administers a second form of the same test to the same people and finds that most people receive almost the same score they had the first time. He should conclude that the test has

Question

Quizplus · Accepted Answer

The fact that most people receive almost the same score on the second administration of the test suggests that the test has high reliability. However, because the professor does not mention any information about the validity of the test (i.e. whether it measures what it is intended to measure), it is unknown. Therefore, the best choice is option B, which indicates high reliability and unknown validity.

Professor Plum Devises a New Personality Test and Administers It