If Researchers Were Evaluating the Effectiveness of a Mandatory Arrest

Multiple Choice

If researchers were evaluating the effectiveness of a mandatory arrest policy in decreasing incidents of intimate partner assault and an event such as the murder trial of O. J. Simpson occurred during the experiment, which of the following might also be said to have an effect on the subjects' outcome scores?

A) exogenous change
B) regression effect
C) external events (history effect)
D) John Henry effect