 Towards the end of Perception and Communication Broadbent explicitly sets out the claim that the theoretical resources developed in thinking about the transmission of information through telephone exchanges provide the basis for an alternative to behaviourism. He also attacks the positivistic methodological principles that had given many behaviourists their motivation. But the central lesson from Broadbent’s work, so far as the theory of attention goes, is a lesson that he takes to be independent of this attack on behaviourism and its positivist foundations. At an early stage in Perception and Communication he remarks that: