Shape Aftereffects Reflect Shape Constancy Operations: Appearance Matters

Storrs, Katherine R. and Arnold, Derek H. (2013) Shape Aftereffects Reflect Shape Constancy Operations: Appearance Matters. Journal of Experimental Psychology-Human Perception and Performance, 39 3: 616-622. doi:10.1037/a0032240


Author Storrs, Katherine R.
Arnold, Derek H.
Title Shape Aftereffects Reflect Shape Constancy Operations: Appearance Matters
Journal name Journal of Experimental Psychology-Human Perception and Performance   Check publisher's open access policy
ISSN 0096-1523
1939-1277
Publication date 2013-06-01
Year available 2013
Sub-type Article (original research)
DOI 10.1037/a0032240
Volume 39
Issue 3
Start page 616
End page 622
Total pages 7
Place of publication Washington, DC United States
Publisher American Psychological Association
Collection year 2014
Language eng
Formatted abstract
One of the oldest known visual aftereffects is the shape aftereffect, wherein looking at a particular shape can make subsequent shapes seem distorted in the opposite direction. After viewing a narrow ellipse, for example, a perfect circle can look like a broad ellipse. It is thought that shape aftereffects are determined by the dimensions of successive retinal images. However, perceived shape is invariant for large retinal image changes resulting from different viewing angles; current understanding suggests that shape aftereffects should not be impacted by the operations responsible for this viewpoint invariance. By viewing adaptors from an angle, with subsequent frontoparallel tests, we establish that shape aftereffects are not solely determined by the dimensions of successive retinal images. Moreover, by comparing performance with and without stereo surface slant cues, we show that shape aftereffects reflect a weighted function of retinal image shape and surface slant information, a hallmark of shape constancy operations. Thus our data establish that shape aftereffects can be influenced by perceived shape, as determined by constancy operations, and must therefore involve higherlevel neural substrates than previously thought.
Keyword Aftereffects
Shape constancy
Adaptation
Shape perception
Spatial Frequency
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Psychology Publications
 
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