Differential drop out rates in your experimental and control groups selection-attrition) is most likely to be a problem in which of the following designs:
A) time series
B) regression discontinuity
C) pretest-posttest control group
D) nonequivalent comparison group

Question

Quizplus · Accepted Answer

Differential dropout rates are a concern in nonequivalent comparison group designs because these designs lack random assignment, making them more susceptible to selection biases and attrition effects.

Differential Drop Out Rates in Your Experimental and Control Groups