Determining the Capacity of Time-Based Selection

Autor/inn/en	Watson, Derrick G.; Kunar, Melina A.
Titel	Determining the Capacity of Time-Based Selection
Quelle	In: Journal of Experimental Psychology: Human Perception and Performance, 38 (2012) 2, S.350-366 (17 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0096-1523
DOI	10.1037/a0025794
Schlagwörter	Visual Stimuli; Attention; Time; Undergraduate Students; Color; Reaction Time; Accuracy; Short Term Memory; Foreign Countries; United Kingdom (Coventry) + Suchen Sie Ihr Suchwort? Aufmerksamkeit; Zeit; Colour; Farbbezeichnung; Farbe; Reaktionsvermögen; Kurzzeitgedächtnis; Ausland
Abstract	In visual search, a set of distractor items can be suppressed from future selection if they are presented (previewed) before a second set of search items arrive. This "visual marking" mechanism provides a top-down way of prioritizing the selection of new stimuli, at the expense of old stimuli already in the field (Watson & Humphreys, 1997). Typically, this "preview benefit" has been examined by measuring the efficiency of detecting a target item contained within a newly presented set. Such work has led to the suggestion that the capacity of the visual marking mechanism is extremely high. Here we present five experiments which measured performance for selecting and responding to all the new stimuli rather than a single target item within the new set. The findings illustrate that when selecting and responding to all new items intentionally trying to prioritize new stimuli has a capacity limit of approximately six to seven items and that this limit depends partly on properties of the stimuli. The findings are discussed in terms of mechanisms of time-based selection, attentional capacity limits, and the task demands of multiple item selection. (Contains 5 footnotes and 6 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10