You are performing a study which examines the change in income over time. You plan to survey working adults with follow-up surveys from the same participants every five years. You find that over time you are losing many study participants as they retire. What type of threat to validity are you experiencing in this situation?
A) mortality threat
B) testing threat
C) maturation threat
D) history threat

Question

Quizplus · Accepted Answer

The loss of participants due to retirement is a form of mortality threat, which is a threat to the validity of longitudinal studies. This is because it can lead to biased results if the characteristics of those who drop out differ from those who remain in the study, leading to difficulties in generalizing the findings.

You Are Performing a Study Which Examines the Change in Income