_____ is a threat to internal validity stemming from either long-term or short-term physiological changes occurring within the participants that may influence the dependent variable.
A) Maturation
B) Attrition
C) Mortality
D) Instrumentation

Question

Quizplus · Accepted Answer

Maturation refers to the natural or biological changes that occur in participants over time, which can affect the outcome of the study, making it a threat to internal validity.

_____ Is a Threat to Internal Validity Stemming from Either