Visual Search Asymmetry with Uncertain Targets

Autor/inn/en	Saiki, Jun; Koike, Takahiko; Takahashi, Kohske; Inoue, Tomoko
Titel	Visual Search Asymmetry with Uncertain Targets
Quelle	In: Journal of Experimental Psychology: Human Perception and Performance, 31 (2005) 6, S.1274-1287 (14 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0096-1523
Schlagwörter	Visual Perception; Computation; Predictive Validity; Task Analysis; Search Strategies; Geometric Concepts; Item Analysis; Psychometrics; Visual Discrimination; Shift Studies + Suchen Sie Ihr Suchwort? Visuelle Wahrnehmung; Aufgabenanalyse; Suchstrategie; Elementare Geometrie; Itemanalyse; Psychometry; Psychometrie; Schichtunterricht
Abstract	The underlying mechanism of search asymmetry is still unknown. Many computational models postulate top-down selection of target-defining features as a crucial factor. This feature selection account implies, and other theories implicitly assume, that predefined target identity is necessary for search asymmetry. The authors tested the validity of the feature selection account using a singleton search task without a predefined target. Participants conducted a target-defined and a singleton search task with a circle (O) and a circle with a vertical bar (Q). Search asymmetry was observed in both tasks with almost identical magnitude. The results were not due to trial-by-trial feature selection, because search asymmetry persisted even when the target was completely unpredictable. Asymmetry in the singleton search was also observed with more complex stimuli, Kanji characters. These results suggest that feature selection is not necessary for search asymmetry, and they impose important constraints on current visual search theories. (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10