Document Detail

The role of visuohaptic experience in visually perceived depth.
MedLine Citation:
PMID:  19357346     Owner:  NLM     Status:  MEDLINE    
Berkeley suggested that "touch educates vision," that is, haptic input may be used to calibrate visual cues to improve visual estimation of properties of the world. Here, we test whether haptic input may be used to "miseducate" vision, causing observers to rely more heavily on misleading visual cues. Human subjects compared the depth of two cylindrical bumps illuminated by light sources located at different positions relative to the surface. As in previous work using judgments of surface roughness, we find that observers judge bumps to have greater depth when the light source is located eccentric to the surface normal (i.e., when shadows are more salient). Following several sessions of visual judgments of depth, subjects then underwent visuohaptic training in which haptic feedback was artificially correlated with the "pseudocue" of shadow size and artificially decorrelated with disparity and texture. Although there were large individual differences, almost all observers demonstrated integration of haptic cues during visuohaptic training. For some observers, subsequent visual judgments of bump depth were unaffected by the training. However, for 5 of 12 observers, training significantly increased the weight given to pseudocues, causing subsequent visual estimates of shape to be less veridical. We conclude that haptic information can be used to reweight visual cues, putting more weight on misleading pseudocues, even when more trustworthy visual cues are available in the scene.
Yun-Xian Ho; Sascha Serwe; Julia Trommershäuser; Laurence T Maloney; Michael S Landy
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2009-04-08
Journal Detail:
Title:  Journal of neurophysiology     Volume:  101     ISSN:  0022-3077     ISO Abbreviation:  J. Neurophysiol.     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-05-27     Completed Date:  2009-08-03     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  0375404     Medline TA:  J Neurophysiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2789-801     Citation Subset:  IM    
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MeSH Terms
Depth Perception / physiology*
Feedback / physiology
Pattern Recognition, Visual / physiology*
Photic Stimulation / methods
Touch / physiology*
Visual Fields / physiology*
Grant Support
EY-08266/EY/NEI NIH HHS; R01 EY008266/EY/NEI NIH HHS; R01 EY008266-20/EY/NEI NIH HHS

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