Document Detail


The time course of contrast adaptation measured with a new method: detection of ramped contrast.
MedLine Citation:
PMID:  25109009     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
The present study introduces a new method to measure contrast detection thresholds before and after adaptation to contrast. A sinusoidal testing grating increased contrast at a constant rate from an initial subthreshold level. Subjects indicated when the grating was just visible, which terminated its presentation. The stimulus contrast at the time of response was taken as a measure of relative threshold. We used the method to measure the time courses of changes in threshold following adaptation, for several adapting contrasts (9, 19, 29, or 39 dB, ref. 1%) and adapting durations (10, 100, or 1000 s). The buildup and decay of adaptation to contrast was described well by a power function of time. These results agree with previous findings, but are more efficient in terms of subject time. This method promises to be a useful tool for studying the dynamics of adaptation to spatial contrast.
Authors:
Xue Dong; Stephen A Engel; Min Bao
Related Documents :
12716919 - Light-dependent translocation of arrestin in the absence of rhodopsin phosphorylation a...
11962759 - Nonvisual photoreceptors of the deep brain, pineal organs and retina.
2200639 - Müller cell gfap expression exhibits gradient from focus of photoreceptor light damage.
24387459 - Design and validation of a high-voltage levitation circuit for electrostatic accelerome...
11397309 - Retinal and optic nerve degeneration in cattle after accidental acrylamide intoxication.
24663659 - Influence of raman scattering on the light field in natural waters: a simple assessment.
23039439 - Chinchilla middle-ear admittance and sound power: high-frequency estimates and effects ...
11980889 - A new wavelet in the multifocal electroretinogram, probably originating from ganglion c...
24608749 - Countering countermeasures: detecting identity lies by detecting conscious breakthrough.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perception     Volume:  43     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  2014  
Date Detail:
Created Date:  2014-08-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  England    
Other Details:
Languages:  eng     Pagination:  427-37     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

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


Previous Document:  Working memory modulates the association between time and number representation.
Next Document:  Visual word expertise: a study of inversion and the word-length effect, with perceptual transforms.