The validity of gain scores based on repeated administration of the same test to research participants
A) does not depend on whether the test has equal intervals across all of its measurement points.
B) depends on whether the test has equal intervals across all of its measurement points.
C) does not depend on whether a given score on a test measures more than one ability.
D) depends on the number of factors manipulated in the experiment.

Question

Quizplus · Accepted Answer

The validity of gain scores, which are differences in test scores from one time to another, depends on the assumption that the test has equal intervals across all of its measurement points. This ensures that a given difference in scores represents the same amount of change in the measured construct, regardless of where on the scale that change occurs.

The Validity of Gain Scores Based on Repeated Administration of the Same