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Titolo:
The effect of orientation learning on contrast sensitivity
Autore:
Matthews, N; Liu, ZL; Qian, N;
Indirizzi:
Columbia Univ, Ctr Neurobiol & Behav, New York, NY 10032 USA Columbia Univ New York NY USA 10032 obiol & Behav, New York, NY 10032 USA Rutgers State Univ, Dept Psychol, Newark, NJ 07102 USA Rutgers State UnivNewark NJ USA 07102 Dept Psychol, Newark, NJ 07102 USA
Titolo Testata:
VISION RESEARCH
fascicolo: 4, volume: 41, anno: 2001,
pagine: 463 - 471
SICI:
0042-6989(200102)41:4<463:TEOOLO>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIRECTION DISCRIMINATION; MOTION DISCRIMINATION; SPATIAL-FREQUENCY; VISUAL-CORTEX; SPECIFICITY; NEURONS; IMPROVEMENT; SELECTIVITY; MECHANISMS; ADAPTATION;
Keywords:
perceptual learning; orientation discrimination; contrast sensitivity; adaptation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Qian, N Columbia Univ, Ctr Neurobiol & Behav, Room A730,722 W 168th St, New York, NY 10032 USA Columbia Univ Room A730,722 W 168th St New York NY USA10032 2 USA
Citazione:
N. Matthews et al., "The effect of orientation learning on contrast sensitivity", VISION RES, 41(4), 2001, pp. 463-471

Abstract

Regan and Beverley [Regan, D., & Beverley, K. I. (1985). Postadaptation orientation discrimination. Journal of the Optical Society of America A, 2(2), 147-155] previously demonstrated that adapting to an oriented visual stimulus improves sensitivity to subtle orientation differences while impairingcontrast sensitivity. Here, we investigated whether practice-based improvements in orientation sensitivity would, like adaptation, impair contrast sensitivity. To the contrary, we found that contrast sensitivity actually improved significantly after observers demonstrated practice-based increases in orientation sensitivity. Therefore, while orientation sensitivity can be enhanced either by orientation-discrimination training or by adapting to visual stimuli, these two procedures have opposite effects on contrast sensitivity. This difference suggests that adaptation and perceptual learning on orientation discrimination cannot be explained sufficiently by a shared underlying cause, such as a reduction in neural activity. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 31/03/20 alle ore 10:25:11