ABSTRACT
Experimental psychology has traditionally been partitioned into separate subdisciplines, with surprisingly little communication across the boundaries. Cognition has traditionally occupied one subdiscipline, with perception and action occupying another subdiscipline. As a result, theories of cognition have typically neglected the perception and action side of our everyday experience. However, it is possible—even likely—that cognition is constrained by human perceptual-motor capabilities. Furthermore, it is likely that perception and action are constrained by cognition. If such constraints exist, then by ignoring them, cognition researchers have been negligent in their pursuit of a complete picture of human cognition.
