Adelman, James S., Guest, Duncan and Kent, Christopher Why do additional presentations help us identify a stimulus? In: Experimental Psychology Society, Leicester, UK, 15-17 Apr 2009

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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
ISI) 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:	Conference Item (Paper)
Subjects:	B Philosophy. Psychology. Religion > BF Psychology
Divisions:	Faculty of Science > Psychology
Library of Congress Subject Headings (LCSH):	Human information processing -- Research, Psychology, Experimental
Status:	Not Peer Reviewed
Version or Related Resource:	Examination of: Nosofsky, R.M. (1983). Information integration and the identification of stimulus noise and criterial noise. Journal of Experimental Psychology: Human Perception and Performance, 9, 299-309.
Conference Paper Type:	Paper
Title of Event:	Experimental Psychology Society
Type of Event:	Other
Location of Event:	Leicester, UK
Date(s) of Event:	15-17 Apr 2009
URI:	http://wrap.warwick.ac.uk/id/eprint/37138

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