A history threat to internal validity refers to the possibility that:
A) the dependent variable is affected by past experiences of the subjects
B) historical events are incorrectly reported
C) unknown events occurring during the study may affect the dependent variable
D) the prior history of the researcher may lead to unconscious bias

Question

Quizplus · Accepted Answer

A history threat to internal validity specifically refers to events that happen during the course of the study, outside of the experimental manipulations, that could affect the outcome (dependent variable). This does not involve past experiences of the subjects (A), how historical events are reported (B), or the researcher's history (D).

A History Threat to Internal Validity Refers to the Possibility