A Bilateral Advantage for Storage in Visual Working Memory

Autor/inn/en	Umemoto, Akina; Drew, Trafton; Ester, Edward F.; Awh, Edward
Titel	A Bilateral Advantage for Storage in Visual Working Memory
Quelle	In: Cognition, 117 (2010) 1, S.69-79 (11 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0010-0277
DOI	10.1016/j.cognition.2010.07.001
Schlagwörter	Visual Stimuli; Short Term Memory; Probability; Recall (Psychology); Observation; Cognitive Processes; Evaluation Methods; Science Education + Suchen Sie Ihr Suchwort? Kurzzeitgedächtnis; Wahrscheinlichkeitsrechnung; Wahrscheinlichkeitstheorie; Abberufung; Beobachtung; Cognitive process; Kognitiver Prozess; Naturwissenschaftliche Bildung
Abstract	Various studies have demonstrated enhanced visual processing when information is presented across both visual hemifields rather than in a single hemifield (the "bilateral advantage"). For example, Alvarez and Cavanagh (2005) reported that observers were able to track twice as many moving visual stimuli when the tracked items were presented bilaterally rather than unilaterally, suggesting that independent resources enable tracking in the two visual fields. Motivated by similarities in the apparent capacity and neural substrates that mediate tracking and visual working memory (WM), the present work examined whether or not a bilateral advantage also arises during storage in visual WM. Using a recall procedure to assess working memory for orientation information, we found a reliable bilateral advantage; recall error was smaller with bilateral sample displays than with unilateral displays. To demonstrate that the bilateral advantage influenced storage "per se" rather than just encoding efficiency, we replicated the observed bilateral advantage using sequentially presented stimuli. Finally, to further characterize how bilateral presentations enhanced storage in working memory, we measured both the number and the resolution of the stored items and found that bilateral presentations lead to an increased probability of storage, rather than enhanced mnemonic resolution. Thus, the bilateral advantage extends beyond the initial selection and encoding of visual information to influence online maintenance in visual working memory. (Contains 14 figures.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10