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Normal and Defective Colour Vision$
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John D. Mollon, Joel Pokorny, and Ken Knoblauch

Print publication date: 2003

Print ISBN-13: 9780198525301

Published to Oxford Scholarship Online: April 2010

DOI: 10.1093/acprof:oso/9780198525301.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 19 October 2021

Reaction Times to Stimuli in Isoluminant Colour Space

Reaction Times to Stimuli in Isoluminant Colour Space

Chapter:
(p.122) Chapter 13 Reaction Times to Stimuli in Isoluminant Colour Space
Source:
Normal and Defective Colour Vision
Author(s):

D. J. Mckeefry

N. R. A. Parry

D I. J. Murray

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198525301.003.0013

Simple reaction times (RTs) are a useful measure of supra-threshold information processing. This chapter examines how the metric used to scale coloured stimuli influences the variation in RT with chromaticity. The variation of simple RT with chromaticity appears to be strongly dependent upon the extent to which stimulus activates either the L/M or S/(L+M) colour opponent mechanism. The dominant influence of these two mechanisms suggests that pre-cortical as opposed to cortical colour processing has a strong influence on the RT to chromatic isoluminant stimuli.

Keywords:   simple reaction times, chromaticity, chromatic isoluminant stimuli, colour processing

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