A psychotherapist has three clients all of whom suffer from agoraphobia. He wants to see if his new behavioral therapy is effective in treating this fear. In the beginning of his experiment, he measures number of times each client goes out in public. The next week, he starts one client on the therapy while withholding it from the other two, and, for all three clients measures number of times each goes out in public that week. Then he keeps the first client on the therapy, starts it with the second client, and again measures number of times out in public for all three. Finally, in week four he starts the therapy with the third client, so now all three are experiencing the therapy. This is an example of which kind of single-case design?

Question

Quizplus · Accepted Answer

This is an example of a multiple baseline design, where the intervention (behavioral therapy) is introduced at different times across subjects (the three clients), allowing for the observation of changes relative to the introduction of the intervention.

A Psychotherapist Has Three Clients All of Whom Suffer from Agoraphobia