To be a history threat,the external event must occur:
A)Constantly during the experiment
B)At the beginning of the experiment
C)Systematically,affecting most members of the group
D)Intentionally,affecting most members of the group

Question

Quizplus · Accepted Answer

A history threat occurs when an external event systematically affects most members of the group during the experiment, potentially influencing their behavior or responses. It is not required to occur constantly, nor does it need to happen at the beginning of the experiment. It may be intentional or unintentional.

To Be a History Threat,the External Event Must Occur