External validity can be reduced by ______ reducing representativeness of the study.
A) the Hawthorne effect
B) maturation
C) regression toward the mean
D) attrition

Question

Quizplus · Accepted Answer

Attrition refers to participants dropping out of a study, which can create biased results and reduce the representativeness of the study. This can reduce external validity, as the findings may not generalize beyond the specific group of participants who completed the study. The Hawthorne effect, maturation, and regression toward the mean can also impact the internal validity of a study, but they do not relate as directly to the representativeness of the sample.

External Validity Can Be Reduced by ______ Reducing Representativeness of the Study