Broadbent's recent explorations of control of dynamic diverges from the ‘ small and simple tradition’. His ‘unselected mode’ of learning and processing, which relies on separate implicit knowledge structures, challenges many traditional assumptions and popular theories of human performance. The two experiments presented here used an arcade-type computer game. Although they are in the tradition of other dynamic control tasks, they differed along several task dimensions. Their convergent but somewhat counter-intuitive results support the incorporation and general importance of unselected, non-verbal channels in the human information processing system.