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Titolo:
The psychophysics of visual search
Autore:
Palmer, J; Verghese, P; Pavel, M;
Indirizzi:
Univ Washington, Dept Psychol, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 Dept Psychol, Seattle, WA 98195 USA Smith Kettlewell Eye Res Inst, San Francisco, CA 94115 USA Smith Kettlewell Eye Res Inst San Francisco CA USA 94115 co, CA 94115 USA Oregon Grad Inst, Dept Elect & Comp Engn, Beaverton, OR 97006 USA Oregon Grad Inst Beaverton OR USA 97006 omp Engn, Beaverton, OR 97006 USA
Titolo Testata:
VISION RESEARCH
fascicolo: 10-12, volume: 40, anno: 2000,
pagine: 1227 - 1268
SICI:
0042-6989(2000)40:10-12<1227:TPOVS>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEXTURE-DISCRIMINATION TASKS; CONTRAST DISCRIMINATION; EYE-MOVEMENTS; SPATIAL UNCERTAINTY; SIGNAL-DETECTION; MULTIDIMENSIONAL STIMULI; PROBABILITY SUMMATION; PSYCHOMETRIC FUNCTION; LUMINANCE INCREMENT; PREATTENTIVE VISION;
Keywords:
search; attention; conspicuity; psychophysics; signal detection theory;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
213
Recensione:
Indirizzi per estratti:
Indirizzo: Palmer, J Univ Washington, Dept Psychol, Box 351525, Seattle, WA 98195 USAUniv Washington Box 351525 Seattle WA USA 98195 le, WA 98195 USA
Citazione:
J. Palmer et al., "The psychophysics of visual search", VISION RES, 40(10-12), 2000, pp. 1227-1268

Abstract

Most theories of visual search emphasize issues of limited Versus unlimited capacity and serial Versus parallel processing. In the present article, we suggest a broader framework based on two principles, one empirical and one theoretical. The empirical principle is to focus on conditions at the intersection of visual search and the simple detection and discrimination paradigms of spatial vision. Such simple search conditions avoid artifacts and phenomena specific to more complex stimuli and tasks. The theoretical principle is to focus on the distinction between high and low threshold theory. While high threshold theory is largely discredited for simple detection anddiscrimination, it persists in the search literature. Furthermore, a low threshold theory such as signal detection theory can account for some of thephenomena attributed to limited capacity or serial processing. In the bodyof this article, we compare the predictions of high threshold theory and three versions of signal detection theory to the observed effects of manipulating set size, discriminability, number of targets, response bias, external noise, and distracter heterogeneity. For almost all cases, the results are inconsistent with high threshold theory and are consistent with all threeversions of signal detection theory. In the Discussion, these simple theories are generalized to a larger domain that includes search asymmetry, multidimensional judgements including conjunction search, response time, searchwith multiple eye fixations and more general stimulus conditions. We conclude that low threshold theories can account for simple visual search without invoking mechanisms such as limited capacity or serial processing. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 23:04:52