ABSTRACT
It is proposed here to present a general theory in terms of which perception in its veridical and nonveridical (or illusory) aspects can be comprehended and explained. The theory is an expansion and refinement of views set out earlier (Day, 1989). A basic assumption is that veridical and illusory perception are coextensive and can be accounted for in the same terms, and much of what follows is concerned with demonstrating the validity of that assumption. The essential identity of veridical and illusory perception implies that an explanation can be developed via the data of either. The present explanation is based mainly on the data of illusory perception.
