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The relative importance of perceptual and memory sampling processes in determining the time course of absolute identification
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Guest, Duncan, Kent, Chris and Adelman, James S. (2018) The relative importance of perceptual and memory sampling processes in determining the time course of absolute identification. Journal of Experimental Psychology: Learning, Memory & Cognition, 44 (4). pp. 615-630. doi:10.1037/xlm0000438 ISSN 0278-7393 .
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Official URL: http://doi.org/10.1037/xlm0000438
Abstract
In absolute identification, the EGCM–RT (Kent & Lamberts, 2005, 2016) proposes that perceptual processing determines systematic response time (RT) variability; all other models of RT emphasise response selection processes. In the EGCM-RT the bow effect in RTs (longer responses for stimuli in the middle of the range) occurs
because these middle stimuli are less isolated and so as perceptual information is accumulated, the evidence supporting a correct response grows more slowly than for stimuli at the ends of the range. More perceptual information is therefore accumulated in order to increase certainty in response for middle stimuli, lengthening RT.
According to the model reducing perceptual sampling time should reduce the size of the bow effect in RT. We tested this hypothesis in two pitch identification experiments. Experiment 1 found no effect of stimulus duration on the size of the RT bow. Experiment 2 used multiple short stimulus durations as well as manipulating set
size and stimulus spacing. Contrary to EGCM-RT predictions, the bow effect on RTs was large for even very short durations. A new version of the EGCM-RT could only capture this, alongside the effect of stimulus duration on accuracy, by including both a perceptual and a memory sampling process. A modified version of the SAMBA model (Brown, Marley, Donkin, & Heathcote, 2008) could also capture the data, by
assuming psychophysical noise diminishes with increased exposure duration. This modelling suggests systematic variability in RT in absolute identification is largely determined by memory sampling and response selection processes.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Psychology | ||||||||
Journal or Publication Title: | Journal of Experimental Psychology: Learning, Memory & Cognition | ||||||||
Publisher: | American Psychological Association | ||||||||
ISSN: | 0278-7393 | ||||||||
Official Date: | 1 April 2018 | ||||||||
Dates: |
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Volume: | 44 | ||||||||
Number: | 4 | ||||||||
Page Range: | pp. 615-630 | ||||||||
DOI: | 10.1037/xlm0000438 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 12 June 2017 | ||||||||
Date of first compliant Open Access: | 19 March 2018 | ||||||||
RIOXX Funder/Project Grant: |
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