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Axis of Elongation Can Determine Reference Frames...
Journal article

Axis of Elongation Can Determine Reference Frames for Object Perception

Abstract

Object perception remains constant in the face of much retinal image variability. One way to achieve such constancy is to represent objects with respect to a reference frame, and many theories of object recognition assume that, among other factors, observers use objects' primary axes of elongation to derive reference frames. However, the limited research directly addressing this assumption suggests that the role of axis of elongation may not be as central as previously though (Palmer, 1990; Quinlan & Humphreys, 1993). The present study re-examines elongation's role in determining reference frames, adapting Palmer's paradigm to determine the extent to which surrounds bias the perception of ambiguously oriented objects: equilateral triangles. When surrounds were oriented inconsistently with experimentally constrained correct responses, response times increased with surrounds' elongation. These results hold for both symmetric and asymmetric surrounds, suggesting that elongation alone is sufficient to construct a reference frame for object perception.

Authors

SEKULER AB

Journal

Canadian Journal of Experimental Psychology/Revue canadienne de psychologie expérimentale, Vol. 50, No. 3, pp. 270–279

Publisher

American Psychological Association (APA)

Publication Date

January 1, 1996

DOI

10.1037/1196-1961.50.3.270

ISSN

1196-1961

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