Abstract
A highly technical theory of visual perception is developed in the first half of this psychological study with the aid of set-theoretical symbols and a complex array of variables ranging over states of the various sub-systems of the organism related to perception. In the later chapters the author describes several new and crucial experiments favoring the theory over other theories of perception, and discusses its philosophical implications for a behavioral account of mind. Those who wade through the welter of symbols will find important material for a philosophy of perception in the theory and especially in the experiments, involving externally induced environmental changes which are corrected by the behavior of the organism over a period of time. --R. H. K.