Which of the following is an example of an ABAB design?
A) Half of the subjects receive one treatment and the other half are not treated.
B) All subjects received one of two treatments.
C) A subject is observed and treated.
D) A subject is observed both before and after two exposures to the treatment.

Question

Quizplus · Accepted Answer

An ABAB design involves baseline observations (A), introduction of the treatment (B), withdrawal of the treatment (A), and reintroduction of the treatment (B). Option D involves observing a subject before treatment (A), treating the subject twice (B), observing the subject again (A), and treating the subject twice again (B), thus following an ABAB design.

Which of the Following Is an Example of an ABAB