There was no more reason to make a permanent place for “consciousness,” “will,” “feeling,” and so on, than for “phlogiston” or “vis anima.” On the contrary, redefined concepts proved to be awkward and inappropriate, and Watsonianism was, in fact, practically wrecked in the attempt to make them work. Thus it came about that while the behaviorists might have applied Bridgman’s principle to representative terms from a mentalistic psychology (and were most competent to do so), they had lost all interest in the matter. (p. 427)
