” The argument for operant behavior therapy is essentially this: What are felt as feelings or introspectively observed as states of mind are states of the body, and they are the products of certain contingencies of reinforcement. The contingencies can be much more easily identified and analyzed than feelings or states of mind, and by turning to them as the thing to be changed, behavior therapy gains a special advantage. An important question remains to be answered, however. How are contingencies to be changed?” (pp. 78-79)
