The history effect is a source of causal invalidity when events outside of the study influence posttest scores.

Name: The history effect is a source of causal invalidity when events outside of the study influence posttest scores.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The history effect refers to external events that occur outside of the experimental study but can influence the participants' behavior or responses, potentially leading to causal invalidity by affecting the posttest scores.

The History Effect Is a Source of Causal Invalidity When