Document Detail


Asymmetric interactions in the processing of the visual dimensions of position, width, and contrast of bar stimuli.
MedLine Citation:
PMID:  1437449     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The processing of different dimensions of a single stimulus may be either integral or separable. Dimensions are called integral if correlated variation of one improves discrimination on the basis of the other and random variation of one interferes with discrimination on the basis of the other. For separable dimensions on the other hand, subjects can attend to one dimension and disregard variations in the other. These discrimination tests were used to find the interactions between the processing of the visual dimensions of position, width, and contrast of a light bar stimulus. The relations between these dimensions were found to be asymmetric: judgments of position and width are independent of contrast variations, but variations in these dimensions influence contrast discriminations. Furthermore, position variations influence width judgements more than vice versa. The data were analyzed for repetition effects, and it was found that this model is not sufficient to explain all the interaction phenomena. The asymmetries found may be related to the different ways these dimensions are mapped onto cortical neuron responses.
Authors:
S Shechter; S Hochstein
Related Documents :
14599569 - Brightness contrast and assimilation from patterned inducing backgrounds.
928489 - Incentive contrast undiminished by extended testing, imipramine, or chlordiazepoxide.
6506469 - A study of stimulus range effects in free modulus magnitude estimation of contrast.
17535369 - The value of contrast sensitivity in diagnosing central serous chorioretinopathy.
8701549 - An in vitro study on the influence of limited frequency resolution on contrast agent-en...
7411269 - Influence of the target size on the deterction threshold for luminance and chromaticity...
3588199 - Aftereffect of induced rotation: number of pattern elements and area of pattern in indu...
23654589 - Aircraft sound environment reproduction: sound field reproduction inside a cabin mock-u...
217019 - Cyclic gmp injected into retinal rod outer segments increases latency and amplitude of ...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Perception     Volume:  21     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  1992  
Date Detail:
Created Date:  1992-12-09     Completed Date:  1992-12-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  297-312     Citation Subset:  IM    
Affiliation:
Neurobiology Department, Hebrew University, Jerusalem, Israel.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Contrast Sensitivity
Female
Humans
Male
Mental Processes
Neural Conduction
Reaction Time
Research Design
Space Perception*
Visual Cortex / physiology
Visual Perception*

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


Previous Document:  Stimulus mislocalization depends on spatial frequency.
Next Document:  Neon flank and illusory contour: interaction between the two processes leads to color filling-in.