________ effects are events external to the study that are related to the study's topic that might affect the behavior of study participants.
A) Cohort
B) Attrition
C) History
D) Reactivity

Question

Quizplus · Accepted Answer

History effects refer to external events that occur during the study that may also affect the behavior of the study participants. These events are not necessarily related to the study but might impact the results.

________ Effects Are Events External to the Study That Are