How does vision specify the objects and events that guide our actions? How does vision interact with other brain systems in this specification? These broad questions motivate the experiments in this proposal. This proposal, the second resubmission of a competitive renewal of the PI's current grant (EY 07760), describes a set of studies using psychophysical methods and novel display techniques to pursue the following research problems: a) perception of shape and figure/ground relations based on edge and contour information specified solely by temporal information; b) influence of auditory signals and environmental context on registration and integration of object/motion information. Specific methods include forced-choice measurement of shape discrimination performance, tracking of periods of dominance and suppression in binocular rivalry accompanied by sound, measurement of direction and/or motion coherence discrimination under conditions where observers are also listening to moving sound sources. Results from these experiments will bear importantly on contemporary theories of feature binding, motion perception and perceptual grouping. In addition, this work broadens the PI's studies to include the role of context on visual perception. It is anticipated that results will point the way to physiological and neural imaging studies of the neural concomitants of visual perception. In addition, the work on spatial structure from temporal synchrony may have implications for understanding clinical disorders involving disruptions in temporal processing, including dyslexia.

Agency
National Institute of Health (NIH)
Institute
National Eye Institute (NEI)
Type
Research Project (R01)
Project #
5R01EY007760-16
Application #
6829697
Study Section
Visual Sciences B Study Section (VISB)
Program Officer
Oberdorfer, Michael
Project Start
1988-09-01
Project End
2007-11-30
Budget Start
2004-12-01
Budget End
2007-11-30
Support Year
16
Fiscal Year
2005
Total Cost
$226,500
Indirect Cost
Name
Vanderbilt University Medical Center
Department
Psychology
Type
Schools of Arts and Sciences
DUNS #
004413456
City
Nashville
State
TN
Country
United States
Zip Code
37212
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Tadin, Duje; Kim, Jejoong; Doop, Mikisha L et al. (2006) Weakened center-surround interactions in visual motion processing in schizophrenia. J Neurosci 26:11403-12

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