Your client came to you because he wants to quit smoking.  Y…

Your client came to you because he wants to quit smoking.  You measure the behavior and determine that the client is smoking two packs of cigarettes each day.  You then have the client try a nicotine patch for two weeks, and then you have the client remove the patch for two weeks.  Finally, you place the client back on the nicotine patch.  This is an example of a(n):