The medium and the message in mental imagery: A theory

Describes a computational theory of imagery that posits that visual mental images are transitory data structures that occur in an analog spatial medium. These "surface" representations are generated from more abstract "deep" representations in long-term memory and, once formed, can be operated upon in various ways. The theory is described in terms of detailed claims about the mental structures and processes invoked during imagery. In addition, the philosophical and empirical roots of the present theory are briefly reviewed. Further, arguments and data that have been offered against the theory are critically examined, and none are found damaging. An alternative account of the data that purportedly support the theory is also examined and found deficient in several respects. Finally, the current status of the "analog-propositional" debate is reviewed. (40 ref)