Which of the following is generally agreed to be a characteristic disadvantage of (or threat to validity in)a reversal design?
A) the lack of a baseline measure
B) the possibility of carryover effects
C) the fact that it is time consuming
D) potential confound of order
E) an increased likelihood of a selection bias

Question

Quizplus · Accepted Answer

Carryover effects are a recognized disadvantage of reversal designs because effects of the initial treatment phase may persist into the subsequent no-treatment or alternative treatment phase, thereby threatening the internal validity of the study by making it difficult to determine the cause of observed changes.

Which of the Following Is Generally Agreed to Be a Characteristic