ABSTRACT
Researchers have been scrupulous in motivating studies of affordances on the basis of the physics of animal-environment relations (e.g., Mark, 1987; Warren, 1984). Through such studies we are beginning to understand the physics that define affordances. Yet understanding of the causal physics is not sufficient for an ecological theory of perception. A tenet of the ecological approach is that affordances are specified; that the physical relations exist in 1: 1 correspondence to structures in energy arrays. This should motivate studies of patterns in stimulus arrays that may specify affordances. However, this issue has received little attention.
