Document Detail

Continuous measurement of visible persistence.
MedLine Citation:
PMID:  2934504     Owner:  NLM     Status:  MEDLINE    
In the synchrony judgment paradigm, observers judge whether a click precedes or follows the onset of a light flash and, on other trials, whether or not a click precedes light termination. The interclick interval defines the duration of visible persistence. An elaboration of this method consists of two phases: In Phase 1, the luminance of a reference stimulus is psychophysically matched to the peak brightness of the test flash. Five luminance values between .1 and 1.0 of the reference stimulus are used subsequently. In Phase 2, a random one of the five reference stimuli, a test flash, and a click are presented; the observer judges whether the click occurred before or after the brightness of test flash reached the reference value (on onset trials) or decayed below it (on termination trials). This method was validated on 3 subjects with test stimuli whose luminance rises and decays slowly in time, and then was used to trace out the precise subjective rise and decay (temporal brightness response function) of brief flashes.
E Weichselgartner; G Sperling
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of experimental psychology. Human perception and performance     Volume:  11     ISSN:  0096-1523     ISO Abbreviation:  J Exp Psychol Hum Percept Perform     Publication Date:  1985 Dec 
Date Detail:
Created Date:  1986-02-06     Completed Date:  1986-02-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7502589     Medline TA:  J Exp Psychol Hum Percept Perform     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  711-25     Citation Subset:  IM    
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MeSH Terms
Acoustic Stimulation
Figural Aftereffect*
Photic Stimulation
Psychomotor Performance
Set (Psychology)
Time Perception

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