As a threat to internal validity, history refers to:
A) a client's earlier life experiences.
B) the possibility that other events may have coincided with the provision of the intervention and may be the real cause of the observed outcome.
C) the passage of time as the explanation for an outcome.
D) None of the above.

Question

Quizplus · Accepted Answer

History as a threat to internal validity refers to external events that occur during the course of a study that may affect the outcome, making it unclear if the intervention or these events caused the observed changes.

As a Threat to Internal Validity, History Refers To