| Does the noise matter? Effects of different kinematogram types on smooth pursuit eye movements and perception. | |
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MedLine Citation:
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PMID: 21149307 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We investigated how the human visual system and the pursuit system react to visual motion noise. We presented three different types of random-dot kinematograms at five different coherence levels. For transparent motion, the signal and noise labels on each dot were preserved throughout each trial, and noise dots moved with the same speed as the signal dots but in fixed random directions. For white noise motion, every 20 ms the signal and noise labels were randomly assigned to each dot and noise dots appeared at random positions. For Brownian motion, signal and noise labels were also randomly assigned, but the noise dots moved at the signal speed in a direction that varied randomly from moment to moment. Neither pursuit latency nor early eye acceleration differed among the different types of kinematograms. Late acceleration, pursuit gain, and perceived speed all depended on kinematogram type, with good agreement between pursuit gain and perceived speed. For transparent motion, pursuit gain and perceived speed were independent of coherence level. For white and Brownian motions, pursuit gain and perceived speed increased with coherence but were higher for white than for Brownian motion. This suggests that under our conditions, the pursuit system integrates across all directions of motion but not across all speeds. |
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Authors:
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Alexander C Schütz; Doris I Braun; J Anthony Movshon; Karl R Gegenfurtner |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't Date: 2010-11-01 |
Journal Detail:
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Title: Journal of vision Volume: 10 ISSN: 1534-7362 ISO Abbreviation: J Vis Publication Date: 2010 |
Date Detail:
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Created Date: 2010-12-14 Completed Date: 2011-06-03 Revised Date: 2011-07-25 |
Medline Journal Info:
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Nlm Unique ID: 101147197 Medline TA: J Vis Country: United States |
Other Details:
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Languages: eng Pagination: 26 Citation Subset: IM |
Affiliation:
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Abteilung Allgemeine Psychologie, Justus-Liebig-Universität, Giessen, Germany. alexander.c.schuetz@psychol.uni-giessen.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Artifacts* Attention / physiology Female Humans Male Models, Neurological* Motion Perception / physiology* Nystagmus, Optokinetic / physiology Photic Stimulation / methods* Psychophysics Pursuit, Smooth / physiology* Reaction Time / physiology Saccades / physiology |
| Grant Support | |
ID/Acronym/Agency:
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EY 04440/EY/NEI NIH HHS; R01 EY002017-26/EY/NEI NIH HHS; R01 EY004440-27/EY/NEI NIH HHS |
| Comments/Corrections | |
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