The proposed research involves a series of experiments aimed at delineating the mechanisms controlling egocentric visual orientation with particular emphasis on (a) visual perception of elevation, (b) visual perception of orientation in the frontal plane (c) visual localization in the horizontal dimension, and (d) the relationships between these three. The experiments are organized around a model (the Great Circle Model) which deals with how influences of oriented lines in the visual field combine to determine three perceptual norms: visually perceived eye level, visually perceived vertical, and visually perceived straight ahead. Other experiments concern the way in which body related and visual information combine. Eight sets of experiments are proposed. The first set extends previous findings on visually perceived eye level to measurement of influences on visually perceived vertical, and asks whether these influences are retinotopic or not. Other experiments examine how the effects of various oriented lines combine, and how sets of linearly arrayed points summate to affect visually perceived eye level. A fourth set of experiments deals with the rise and decay of the influence of the visual field. The fifth set explores the effect of body orientation on visually perceived eye level and visually perceived straight ahead. Two sets of experiments examine the role of binocular stimulation and other information about surface orientation. A final set looks at the role of eye position information.

Agency
National Institute of Health (NIH)
Institute
National Eye Institute (NEI)
Type
Research Project (R01)
Project #
5R01EY010534-04
Application #
2711102
Study Section
Special Emphasis Panel (ZRG1-VISB (04))
Project Start
1995-09-01
Project End
2000-08-31
Budget Start
1998-09-01
Budget End
2000-08-31
Support Year
4
Fiscal Year
1998
Total Cost
Indirect Cost
Name
Columbia University (N.Y.)
Department
Psychology
Type
Other Domestic Higher Education
DUNS #
064931884
City
New York
State
NY
Country
United States
Zip Code
10027
Li, Wenxun; Matin, Ethel; Matin, Leonard (2013) Short-lived effects of a visual inducer during egocentric space perception and manual behavior. Atten Percept Psychophys 75:1012-26
Shavit, Adam Y; Li, Wenxun; Matin, Leonard (2013) Individual differences in perceived elevation and verticality: evidence of a common visual process. Multisens Res 26:205-39
Hudson, Todd E; Matin, Leonard; Li, Wenxun (2008) Binocular spatial induction for the perception of depth does not cross the midline. Proc Natl Acad Sci U S A 105:18006-11
Hudson, Todd E; Li, Wenxun; Matin, Leonard (2006) The field dependence/independence cognitive style does not control the spatial perception of elevation. Percept Psychophys 68:377-92
Li, Wenxun; Matin, Leonard (2005) The rod-and-frame effect: the whole is less than the sum of its parts. Perception 34:699-716
Li, Wenxun; Matin, Leonard (2005) Visually perceived vertical (VPV): induced changes in orientation by 1-line and 2-line roll-tilted and pitched visual fields. Vision Res 45:2037-57
Li, Wenxun; Matin, Leonard (2005) Two wrongs make a right: linear increase of accuracy of visually-guided manual pointing, reaching, and height-matching with increase in hand-to-body distance. Vision Res 45:533-50
Li, W; Dallal, N; Matin, L (2001) Influences of visual pitch and visual yaw on visually perceived eye level (VPEL) and straight ahead (VPSA) for erect and rolled-to-horizontal observers. Vision Res 41:2873-94
Matin, L; Li, W (2001) Neural model for processing the influence of visual orientation on visually perceived eye level (VPEL). Vision Res 41:2845-72
Matin, L; Li, W (2000) Linear combinations of signals from two lines of the same or different orientations. Vision Res 40:517-27

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