Which threat to internal validity is of particular concern to Pre-post designs?
A) Diffusion
B) Individual differences
C) Maturation
D) Differential attrition

Question

Quizplus · Accepted Answer

Maturation is a threat to internal validity that is particularly concerned with pre-post designs. Maturation refers to the changes that occur naturally over time in the participants, which may affect the outcome of the study. Since pre-post designs involve measuring participants before and after an intervention, any changes that occur naturally over time may be attributed to the intervention, when in fact they are simply maturation effects.

Which Threat to Internal Validity Is of Particular Concern to Pre-Post