The relative importance of perceptual and memory sampling processes in determining the time course of absolute identification

Guest, D. ORCID: 0000-0003-4514-9186, Kent, C. and Adelman, J.S., 2017. The relative importance of perceptual and memory sampling processes in determining the time course of absolute identification. Journal of Experimental Psychology: Learning, Memory, and Cognition. ISSN 0278-7393 (Forthcoming)

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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 rocesses. 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
Alternative Title: Perceptual and memory sampling in absolute identification [working title]
Publication Title: Journal of Experimental Psychology: Learning, Memory, and Cognition
Creators: Guest, D., Kent, C. and Adelman, J.S.
Publisher: American Psychological Association
Date: 2017
ISSN: 0278-7393
Divisions: Schools > School of Social Sciences
Depositing User: Jill Tomkinson
Date Added: 23 Jun 2017 11:11
Last Modified: 27 Sep 2017 15:42
URI: http://irep.ntu.ac.uk/id/eprint/31062

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