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Titolo:
COMPETITION AND SHARING OF PROCESSING RESOURCES IN VISUAL-DISCRIMINATION
Autore:
MAGNUSSEN S; GREENLEE MW;
Indirizzi:
UNIV OSLO,DEPT PSYCHOL,VIS LAB,BOX 1094 BLINDERN N-0317 OSLO NORWAY UNIV FREIBURG,DEPT NEUROL D-7800 FREIBURG GERMANY
Titolo Testata:
Journal of experimental psychology. Human perception and performance
fascicolo: 6, volume: 23, anno: 1997,
pagine: 1603 - 1616
SICI:
0096-1523(1997)23:6<1603:CASOPR>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
SHORT-TERM-MEMORY; SPATIAL-FREQUENCY; SELECTIVE ATTENTION; FOCAL ATTENTION; HUMAN-VISION; TIME-COURSE; ORIENTATION; INFORMATION; CONTRAST; OBJECTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Citazioni:
58
Recensione:
Indirizzi per estratti:
Citazione:
S. Magnussen e M.W. Greenlee, "COMPETITION AND SHARING OF PROCESSING RESOURCES IN VISUAL-DISCRIMINATION", Journal of experimental psychology. Human perception and performance, 23(6), 1997, pp. 1603-1616

Abstract

Discrimination thresholds for spatial frequency and contrast tested individually were compared with dual discrimination of contrast and spatial frequency, and dual discrimination of 2 contrast or spatial frequency components. The components were presented overlapping, forming a compound grating or as side-by-side simple gratings. When observers had to judge contrast and spatial frequency simultaneously, discrimination thresholds increased by an amount predicted by a model of stimulus uncertainty for orthogonal dimensions (1.7); when they had to judge 2 frequency or contrast components, discrimination thresholds increased by a factor of 3-6 compared with the single-judgment task. The relative spatial location of the components did not interact with task complexity. The results are consistent with a model assuming a set of parallel special-purpose attentional mechanisms.

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Documento generato il 20/09/20 alle ore 00:43:13