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) ____.

Question

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This is a single-participant experiment because it involves manipulating an independent variable (monetary rewards) to see its effect on a dependent variable (number of cigarettes smoked) in a single individual, with the individual's behavior serving as its own control.

Dr Quillen Treats a Chronic Smoker by First Recording the Number