Guest, Duncan, Kent, Christopher and Adelman, James S. . (2010) Why additional presentations help identify a stimulus. Journal of Experimental Psychology: Human Perception and Performance, Vol.36 (No.6). pp. 1609-1630. ISSN 0096-1523

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Abstract

Nosofsky (1983) reported that additional stimulus presentations within a trial increase discriminability in absolute identification, suggesting that each presentation creates an independent stimulus representation, but it remains unclear whether exposure duration or the formation of independent representations improves discrimination in such conditions. Experiment 1 replicated Nosofsky's result. Experiments 2 (masking the ISI between two-presentations) and 3 (manipulating stimulus duration without changing number of presentations or overall trial duration) ruled out an explanation in terms of extended opportunities for stimulus sampling, from either a sensory buffer during additional ISIs or increased stimulus exposure, respectively. Experiment 4 (comparing two and three-presentations, other factors controlled) provided some limited additional support for Nosofsky's original claim that additional stimulus presentations can create either independent or duplicate representations. Experiments 5 and 6 (both manipulating IS!) demonstrated that a key factor in the additional stimulus presentation effect is the overall trial duration. We discuss the results in relation to models of absolute identification, their relative emphasis on stimulus sampling versus response selection, and the mechanisms by which duplicate representations could be created.

Item Type:	Journal Article
Subjects:	B Philosophy. Psychology. Religion > BF Psychology
Divisions:	Faculty of Science > Psychology
Library of Congress Subject Headings (LCSH):	Perception, Cognition, Human information processing, Stimulus intensity
Journal or Publication Title:	Journal of Experimental Psychology: Human Perception and Performance
Publisher:	American Psychological Association
ISSN:	0096-1523
Date:	December 2010
Volume:	Vol.36
Number:	No.6
Number of Pages:	22
Page Range:	pp. 1609-1630
Identification Number:	10.1037/a0020562
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Economic and Social Research Council (Great Britain) (ESRC), Great Western Research Fellowship (GWR)
Grant number:	RES-000-22-2459 (ESRC), RES-062-23-0545 (ESRC)
URI:	http://wrap.warwick.ac.uk/id/eprint/4617

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