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Titolo:
SPATIAL ATTENTION - EFFECT OF POSITION UNCERTAINTY AND NUMBER OF DISTRACTOR PATTERNS ON THE THRESHOLD-VERSUS-CONTRAST FUNCTION FOR CONTRASTDISCRIMINATION
Autore:
FOLEY JM; SCHWARZ W;
Indirizzi:
UNIV CALIF SANTA BARBARA,DEPT PSYCHOL SANTA BARBARA CA 93106
Titolo Testata:
Journal of the Optical Society of America. A, Optics, image science,and vision.
fascicolo: 5, volume: 15, anno: 1998,
pagine: 1036 - 1047
SICI:
1084-7529(1998)15:5<1036:SA-EOP>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
SIMPLE VISUAL-SEARCH; HUMAN-VISION; MASKING; INTEGRATION; MECHANISMS; FREQUENCY; STIMULUS; MODELS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
39
Recensione:
Indirizzi per estratti:
Citazione:
J.M. Foley e W. Schwarz, "SPATIAL ATTENTION - EFFECT OF POSITION UNCERTAINTY AND NUMBER OF DISTRACTOR PATTERNS ON THE THRESHOLD-VERSUS-CONTRAST FUNCTION FOR CONTRASTDISCRIMINATION", Journal of the Optical Society of America. A, Optics, image science,and vision., 15(5), 1998, pp. 1036-1047

Abstract

Our goal is to integrate knowledge about contrast discrimination withknowledge about spatial attention effects, rin experiment is described that measures the effects of position uncertainty, number of distractors, and contrast on the contrast discrimination threshold in a fullycrossed factorial design. The threshold-versus-contrast function is nonmonotonic in all conditions, decreasing and then increasing as contrast increases, increasing uncertainty and/or the number of distractersincreases thresholds, and there are interactions among the three variables indicating that uncertainty and distracter number have differenteffects on detection as distracter contrast varies. The results are well accounted for by a model that combines a nonlinear excitation/divisive inhibition model of pattern mechanisms with a noise-limited modelof the decision process. (C) 1998 Optical Society of America.

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Documento generato il 03/12/20 alle ore 12:48:08