  Is the case against behaviorism definitive? Decisive? Paul Meehl noted decades ago that theories in psychology seem to disappear not under the force of decisive refutation but rather because researchers lose interest in their theoretical orientations (Meehl 1978). One implication of Meehl’s thesis is that a once popular “Ism”, not having been decisively refuted, may restore some of its former prominence if it mutates or transforms itself so as to incorporate responses to criticisms. What may this mean for behaviorism? It may mean that some version of the doctrine might rebound.