Dr Quillen Treats a Chronic Smoker by First Recording the Number

Multiple Choice

Dr. Quillen treats a chronic smoker by first recording the number of cigarettes smoked daily, then offering monetary rewards for each day that one fewer cigarette is smoked. Because the client's own behavior serves as a control, this kind of study is called a(n) ____.

A) analogue study
B) single-participant experiment
C) correlational study
D) case study