Ecological and sensorimotor theories of perception build on the notion of action-dependent invariants as the basic structures underlying perceptual capacities. In this paper we contrast the assumptions these theories make on the nature of perceptual information modulated by action. By focusing on the question, how movement specifies perceptual information, we show that ecological and sensorimotor theories endorse substantially different views about the role of action in perception. In particular we argue that ecological invariants are characterized with reference to transformations produced (...) in the sensory array by movement: such invariants are transformation-specific but do not imply motor-specificity. In contrast, sensorimotor theories assume that perceptual invariants are intrinsically tied to specific movements. We show that this difference leads to different empirical predictions and we submit that the distinction between motor equivalence and motor-specificity needs further clarification in order to provide a more constrained account of action/perception relations. (shrink)

The main idea of this book is that perceiving is a way of acting. Perception is not something that happens to us, or in us. It is something we do. Think of a blind person tap-tapping his or her way around a cluttered space, perceiving that space by touch, not all at once, but through time, by skillful probing and movement. This is, or at least ought to be, our paradigm of what perceiving is. The world makes itself available to (...) the perceiver through physical movement and interaction. In this book I argue that all perception is touch-like in this way: perceptual experience acquires content thanks to our possession of bodily skills. What we perceive is determined by what we do ; it is determined by what we are ready to do. In ways I try to make precise, we enact our perceptual experience; we act it out. (shrink)

Most psychology begins with a distinction between organism and environment, where the two are implicitly (and sometimes explicitly) conceptualized as flipsides of a skin-severed space. This paper examines that conceptualization. Dewey and Bentley's (1949) account of firm naming is used to show that psychologists have, in general, (1) employed the skin as a morphological criterion for distinguishing organisms from backgrounds, and (2) equated background with environment. This two-step procedure, which in this article is named the morphological conception of organism, is (...) shown to inform the writings of the well-known psychologist B. F. Skinner. A review of difficulties with the morphological conception is followed with a review and preliminary integration of four attempts at an alternative conception of organism, and thus environment. Together, these four attempts converge on an analysis of living systems as transdermal (through and across skin) processes only within which organism and environment are distinguishable as complementary phases. The notion of a biological total process, or bioprocess, is employed to clarify this alternative analysis, in which an organism is an ongoing organization rather than a skin-bound body. (shrink)