Irvin Rock was a global perceptual theorist in the grand tradition of von Helmoltz, Wertheimer, and Gibson. This posthumous volume, the culmination of a long and distinguished career, brings together an original essay by the author together with a careful selection of previously published articles (most by Rock) on the theory that perception is an indirect process in which visual experience is derived by inference, rather than being directly and independently determined by retinal stimulation.

Rock's reasons for holding that perception is indirect were mainly empirical. Unlike many...