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Spatial frequency discrimination: visual long-term memory or criterion setting?

Lages, M., and Treisman, M. (1998) Spatial frequency discrimination: visual long-term memory or criterion setting? Vision Research, 38 (4). pp. 557-572. ISSN 0042-6989 (doi:10.1016/S0042-6989(97)88333-2)

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Abstract

A long-term sensory memory is believed to account for spatial frequency discrimination when reference and test stimuli are separated by long intervals. We test an alternative proposal: that discrimination is determined by the range of test stimuli, through their entrainment of criterion-setting processes. Experiments 1 and 2 show that the 50% point of the psychometric function is largely determined by the midpoint of the stimulus range, not by the reference stimulus. Experiment 3 shows that discrimination of spatial frequencies is similarly affected by orthogonal contextual stimuli and parallel contextual stimuli and that these effects can be explained by criterion-setting processes. These findings support the hypothesis that discrimination over long intervals is explained by the operation of criterion-setting processes rather than by long-term sensory retention of a neural representation of the stimulus.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lages, Dr Martin
Authors: Lages, M., and Treisman, M.
College/School:College of Science and Engineering > School of Psychology
Journal Name:Vision Research
Publisher:Pergamon
ISSN:0042-6989
ISSN (Online):1878-5646

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