  One defining aspiration of traditional behaviorism is that it tried to free psychology from having to theorize about how animals and persons represent (internally, in the head) their environment. This effort at freedom was important, historically, because it seemed that behavior/environment connections are a lot clearer and more manageable experimentally than internal representations.  Unfortunately, for behaviorism, it’s hard to imagine a more restrictive rule for psychology than one which prohibits hypotheses about representational storage and processing. Stephen Stich, for example, complains against Skinner that “we now have an enormous collection of experimental data which, it would seem, simply cannot be made sense of unless we postulate something like” information processing mechanisms in the heads of organisms (1998, p. 649).