Document Detail

The perception of motion transparency: a signal-to-noise limit.
MedLine Citation:
PMID:  15797777     Owner:  NLM     Status:  MEDLINE    
A number of studies were conducted to determine how many transparent motion signals observers could simultaneously perceive. It was found that that the limit was two. However, observers required a signal intensity of about 42% in order to perceive a bi-directional transparent stimulus. This signal level was about three times that required to detect a uni-directional motion signal, and higher than was physically possible to achieve in a tri-directional stimulus (in a stimulus in which the different transparent signals are defined only by direction). These results indicate that signal intensity plays an important role in establishing the transparency limit and, as a consequence, implicates the global-motion area (V5/MT) in this process.
Mark Edwards; John A Greenwood
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Vision research     Volume:  45     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  2005 Jun 
Date Detail:
Created Date:  2005-03-30     Completed Date:  2005-08-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  1877-84     Citation Subset:  IM    
School of Psychology, Australian National University, Canberra 0200, Australia.
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MeSH Terms
Discrimination (Psychology)
Form Perception*
Motion Perception*
Photic Stimulation / methods
Sensory Thresholds

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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