Which of the following best addresses the nature of a threat to internal validity that is caused by history?
A) changes in how a variable is measured during the course of the study
B) the differential dropping out of the participants from a study
C) an unexpected or unrelated event occurring during the study that could influence responses
D) physiological changes occurring in participants during the course of the study

Question

Quizplus · Accepted Answer

An unexpected or unrelated event occurring during the study that could influence responses is a history threat, as it refers to external events that happen during the course of the study which could affect its outcomes.

Which of the Following Best Addresses the Nature of a Threat