Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
LIMITED-CAPACITY MECHANISMS OF VISUAL-DISCRIMINATION
Autore:
GREENLEE MW; MAGNUSSEN S;
Indirizzi:
UNIV FREIBURG,DEPT NEUROL,BREISACHERSTR 64 D-79106 FREIBURG GERMANY UNIV FREIBURG,BRAIN RES GRP D-79106 FREIBURG GERMANY UNIV OSLO,DEPT PSYCHOL,VIS LAB N-0317 OSLO NORWAY
Titolo Testata:
Vision research
fascicolo: 3, volume: 38, anno: 1998,
pagine: 375 - 385
SICI:
0042-6989(1998)38:3<375:LMOV>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
SHORT-TERM-MEMORY; SPATIAL-FREQUENCY DISCRIMINATION; HEMISPHERIC-DIFFERENCES; INFORMATION; ATTENTION; CONTRAST; TIME; ORIENTATION; SYSTEMS; DIMENSIONS;
Keywords:
DIVIDED ATTENTION; PERCEPTUAL DISCRIMINATION; SHORT-TERM MEMORY; SPATIAL FREQUENCY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
53
Recensione:
Indirizzi per estratti:
Citazione:
M.W. Greenlee e S. Magnussen, "LIMITED-CAPACITY MECHANISMS OF VISUAL-DISCRIMINATION", Vision research, 38(3), 1998, pp. 375-385

Abstract

Discrimination thresholds of spatial frequency and choice reaction times (RT) were measured in three subjects who performed a dual-judgmentdelayed discrimination task, Two reference gratings were presented side-by-side with a 0-800 msec stimulus onset asynchrony (SOA), which were followed after a 5-sec retention interval by two test gratings, Subjects judged which component changed and which interval had the higherspatial frequency (SF), Thresholds in the dual-judgment task were four to six times higher than thresholds in single-judgment tasks, The SOA had only a moderate effect on discrimination thresholds, whereas thedifference between the spatial frequencies of the two components had a highly significant effect, The discrimination thresholds increase with increasing spatial frequency difference for the lower SF component,while they decrease for the higher SF component. An analysis of the distribution of possible error types indicated that all subjects tendedto respond more frequently that the higher SF component changed, Thistendency led to more errors on trials where the low SF component changed, A post-hoc analysis revealed, in two of the three subjects, a significant correlation between Delta f/f and RT such that higher Delta f/f values were associated with lower RTs and vice versa. (C) 1998 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 07:13:32