Gerard conducts a study to examine the effectiveness of an exercise program on obese people. The participants must exercise for one hour every day for six months. By the end of the fourth month, Gerard finds that 75 percent of the participants dropped out of the study. What kind of problem has Gerard encountered in his study?
A)Maturation
B)Morbidity
C)Attrition
D)Selection

Question

Quizplus · Accepted Answer

Gerard has encountered attrition, which is the loss of participants during a study. In this case, 75 percent of the participants dropped out before the study was complete. Maturation refers to changes that occur naturally over time and could affect the results. Morbidity refers to the prevalence of disease or illness in a population. Selection refers to potential bias when choosing participants for a study.

Gerard Conducts a Study to Examine the Effectiveness of an Exercise