Differential attrition in comparison and experimental groups creates what type of internal invalidity?
A)selection bias
B)endogenous change
C)history effects
D)contamination

Question

Quizplus · Accepted Answer

Differential attrition, meaning that participants drop out of the study at different rates between comparison and experimental groups, can create selection bias. This is because the sample that remains in each group may no longer be representative of the original population, potentially leading to biased results.

Differential Attrition in Comparison and Experimental Groups Creates What Type