Multiple Choice
Which of the following best addresses the nature of the threat to internal validity that is caused by testing effects?
A) participants' scores changing on subsequent measurements simply because of their increased familiarity
B) the differential dropping out of the participants from a study
C) an unexpected or unrelated event occurring during the study that could influence responses
D) physiological changes occurring in participants during the course of the study
Correct Answer:

Verified
Correct Answer:
Verified
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