 |
| Research article summary (published 29 Apr 2003): |
Efficiency and internal noise for detection of suprathreshold patterns measured using simple reaction time.
Full Abstract
Studies of the detection of simple visual patterns at threshold contrast have found that human performance is limited by the addition of internal noise and by the sub-optimal sampling efficiency of the visual system. Many common visual tasks require the detection of a signal having a contrast well above threshold, and we sought to measure the internal noise and sampling efficiency for such signals using simple reaction time (RT). Observers were presented with suprathreshold Gabors in dynamic Gaussian white noise and were required to hit a button as soon as each was detected. By comparing the RT variances from humans to those of an ideal observer, visuomotor internal noise and sampling efficiency were measured. The internal noise remains constant and the sampling efficiency increases as the signal contrast increases.
Learn Faster Today Improve your study skills
Author information
Author/s: Simpson, William A (WA); Findlay, Kellyanne (K); Manahilov, Velitchko (V);
Affiliation: SMART--DRDC Toronto, 1133 Sheppard Avenue West, PO Box 2000, Toronto, Ontario, Canada M3M 3B9. william.simpson@drdc-rddc.gc.ca
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Vision research (Vision Res), published in England. (Language: eng)
Reference: 2003-May; vol 43 (issue 10) : pp 1103-9
Dates: Created 2003/04/22; Completed 2003/07/21; Revised 2006/11/15;
PMID: 12705951, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
External Links for this article (including full text providers, if available):
Click Electronic Full-text Provider Links to see options for finding the electronic full text links to this article. Note there may be a subscription or fee required for access to the full text. See our FAQ for information on finding FREE full text articles.
This article may also be located in paper journal collections available in many libraries. Use the Journal and Publication Information above to find the full article.
MeSH headings (categories)
This article was linked to the MESH Headings shown below.
|
|
Related articles
This article has not been indexed for related articles as yet, however you can still use the live related article search links below.
See a large map of 100+ related articles.