≪Organizer Abstract≫
The issue of whether and how we can perceivepassability of apertures is one of the most important topics of study on affordance perception (Warren & Whang, 1987; Gibson, 1966, 1979). One of the aims of the present symposium is to lay out some (if not all) of the recent studies on our ability to make such judgments about a given aperture by various means of locomotion (walking, running, etc.), with or without an external object attached to the body (a-person-sitting-in-a-wheel-chair, a-person-walking-with-a-handheld-object, a-person-walking-and-pushing-a-cart, etc.), and in a variety of situations (single or multiple apertures). Despite the accumulating empirical studies, however, there has not been a single definitive theory that explains all the data at this moment. The other aim of this symposium, then, is to discuss the perceptual basis of the passability judgment, and what the data presented in this symposium reveal about these theories.
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