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ERIC Number: EJ934419
Record Type: Journal
Publication Date: 2011-Jun
Pages: 21
Abstractor: As Provided
Reference Count: 97
ISBN: N/A
ISSN: ISSN-0096-1523
Extending the Simultaneous-Sequential Paradigm to Measure Perceptual Capacity for Features and Words
Scharff, Alec; Palmer, John; Moore, Cathleen M.
Journal of Experimental Psychology: Human Perception and Performance, v37 n3 p813-833 Jun 2011
In perception, divided attention refers to conditions in which multiple stimuli are relevant to an observer. To measure the effect of divided attention in terms of perceptual capacity, we introduce an extension of the simultaneous-sequential paradigm. The extension makes predictions for fixed-capacity models as well as for unlimited-capacity models. We apply this paradigm to two example tasks, contrast discrimination and word categorization, and find dramatically different effects of divided attention. Contrast discrimination has unlimited capacity, consistent with independent, parallel processing. Word categorization has a nearly fixed capacity, consistent with either serial processing or fixed-capacity, parallel processing. We argue that these measures of perceptual capacity rely on relatively few assumptions compared to most alternative measures. (Contains 10 figures.)
American Psychological Association. Journals Department, 750 First Street NE, Washington, DC 20002-4242. Tel: 800-374-2721; Tel: 202-336-5510; Fax: 202-336-5502; e-mail: order@apa.org; Web site: http://www.apa.org/publications
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A