• “[Skinner] does not invoke other events, processes, or mechanisms which are hypothesized or invented for the purpose of mediating between behavior and its empirical determinants. This omission is sometimes misconstrued as a denial that mediating mechanisms exist; they obviously do, they are obviously neurological and they are also obviously themselves lawful. ...The argument [against employing them as part of scientific practice] is simplicity itself... [Skinner] considers such theoretical terms unnecessary; they may generate research whose only usefulness is to disconfirm the mediating entity or redefine it without increasing our knowledge of behavior's controlling variables; they can become the absorbing focus of an inquiry and so deflect attention from behavior itself; they can become a "refuge from the data".”

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