Which threat to internal validity is most closely associated with a longitudinal design?
A) Instrumentation effects
B) Mortality effects
C) History effects
D) Selection bias

Question

Quizplus · Accepted Answer

Correct B: A major disadvantage of longitudinal design is loss of research subjects.
Incorrect A: Instrumentation effects or testing effects can occur in many types of research design and are not more likely in longitudinal design.
Incorrect C: History effects can occur in any kind of research design.
Incorrect D: Selection bias is due to problems with sampling processes rather than design issues.

Which Threat to Internal Validity Is Most Closely Associated with a Longitudinal