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Seeing big things: overestimation of heights is greater for real objects than for objects in picturesIn six experiments we demonstrate that the vertical-horizontal illusion that is evoked when viewing photographs and line drawings is relatively small, whereas the magnitude of this illusion when large objects are viewed is at least twice as great. Furthermore, we show that the illusion is due more to vertical overestimation than horizontal underestimation. The lack of a difference in vertical overestimation between pictures and line drawings suggests that vertical overestimation in pictures depends solely on the perceived physical size of the projection on the picture surface, rather than on what is apparent about an object's represented size. The vertical-horizontal illusion is influenced by perceived physical size. It is greater when viewing large objects than small pictures of these same objects, even when visual angles are equated.
Document ID
20040141677
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Yang, T. L.
(University of Virginia Charlottesville 22903-2477, United States)
Dixon, M. W.
Proffitt, D. R.
Kaiser, M. K.
Date Acquired
August 22, 2013
Publication Date
January 1, 1999
Publication Information
Publication: Perception
Volume: 28
Issue: 4
ISSN: 0301-0066
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: MH52640
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Space Human Factors
NASA Center ARC

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