| Similar perceptual costs for dividing attention between retina- and space-centered targets in humans. | |
| | |
MedLine Citation:
|
PMID: 21047736 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
|
Visual-spatial attention enhances the perception of behaviorally relevant stimuli. One issue that remains unclear is whether attention is preferentially allocated to stimuli that remain fixed in one reference frame (e.g., retina-centered), or whether it could be equally allocated to stimuli fixed in other frames. We investigated this issue by asking observers to covertly attend to sinusoidal gratings fixed in different reference frames and to discriminate changes in their orientation. First, we quantified orientation discrimination thresholds (ODTs) while subjects pursued a moving dot and either attended to a retina- or a space-centered grating. We then measured ODTs while subjects divided attention between the two gratings. We found that dividing attention proportionally increased ODTs for both target gratings relative to the focused attention condition. Second, we used the same stimulus configuration and conditions during a fixation task. Here, one grating was retina- and space-centered while the other moved in space and on the retina. Again, ODTs during divided attention proportionally increased for both gratings. These increases were similar to those measured during smooth pursuit. Our results show that humans can proportionally divide attention between targets centered in different reference frames during both smooth pursuit eye movements and fixations. |
| | |
Authors:
|
Robert Niebergall; Lawrence Huang; Julio C Martinez-Trujillo |
Related Documents
:
|
10336056 - Mu rhythm modulation during changes of visual percepts. 8474846 - The role of depth stratification in the solution of the aperture problem. 9373686 - Interaction between sub- and supra-nyquist spatial frequencies in peripheral vision. 18185696 - Chirped-frequency generation in a translated-grating-type frequency-shifted feedback la... 11040306 - The scaphotrapezio-trapezoidal joint. part 2: a kinematic study. 12211036 - Normal mode analysis of macromolecular motions in a database framework: developing mode... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-10-01 |
Journal Detail:
|
Title: Journal of vision Volume: 10 ISSN: 1534-7362 ISO Abbreviation: J Vis Publication Date: 2010 |
Date Detail:
|
Created Date: 2010-11-04 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101147197 Medline TA: J Vis Country: United States |
Other Details:
|
Languages: eng Pagination: 4 Citation Subset: IM |
Affiliation:
|
Cognitive Neurophysiology Laboratory, McGill University, Montreal, Quebec, Canada. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
| Grant Support | |
ID/Acronym/Agency:
|
//Canadian Institutes of Health Research |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Binocular rivalry: a time dependence of eye and stimulus contributions.
Next Document: Toward a unified chromatic induction model.