When a change in the dependent variable could be due to participants' familiarity with the test, __________ is a threat to internal validity.
A)attrition
B)testing
C)diffusion of treatment
D)instrumentation

Question

Quizplus · Accepted Answer

Testing is a threat to internal validity when participants' familiarity with the test may affect the results of the dependent variable. This is the case when participants take the same test multiple times, and their previous exposure to the test may affect their performance on subsequent administrations.

When a Change in the Dependent Variable Could Be Due