A serious problem of interpretation can arise in the ABAB design when
A) performance in the second baseline period does not reverse, that is, return to the level in the initial baseline period.
B) performance in the initial baseline period is too high or too low.
C) performance in the second baseline period is worse than it was in the initial baseline period.
D) performance improves to the same degree in both intervention periods.

Question

Quizplus · Accepted Answer

The ABAB design relies on the assumption that the intervention (B) causes a change in behavior and that this change is reversed when the intervention is withdrawn (A). However, if performance in the second baseline period (A2) does not return to the level in the initial baseline period (A1), it is difficult to determine if the change in behavior was due to the intervention or some other variable. This is known as the problem of non-reversal and can undermine the internal validity of the design.

A Serious Problem of Interpretation Can Arise in the ABAB