GEOMETRIC–OPTICAL ILLUSIONS: A PEDESTRIAN’S VIEW OF THE PHENOMENAL LANDSCAPE

  • Jirí Wackermann

Abstract

In the present paper some types of geometric–optical illusions are discussed, with a particular focus on distortions of shape in contour fields. A “principle of contiguous variation†is proposed as a heuristic tool in search for a unitary description, i.e., a truly phenomenological theory of these phenomena, and some consequences of the proposal for experimental research are pondered.

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