A school psychologist has written a test to predict success in algebra. She administers the test on Monday to ten students. Wednesday, she administers the same test again to the same ten students. She is attempting to ________.
A) measure environmental effects on student test performance
B) get an estimate of criterion-related validity
C) get an estimate of content validity
D) establish the test's reliability

Question

Quizplus · Accepted Answer

The psychologist is administering the same test to the same students again in order to establish the test's reliability, which measures the consistency and stability of test scores over time. If the results from the two administrations of the test are consistent, then the test is reliable. Choice A refers to studying the impact of external factors on test performance, which is not the purpose of re-administering the test. Choice B refers to assessing whether the test is related to a specific criterion, such as success in algebra, which is not the purpose of re-administering the test. Choice C refers to assessing whether the test measures the content it is intended to measure, which is not the purpose of re-administering the test.

A School Psychologist Has Written a Test to Predict Success