Are hue and saturation carried in different neural channels?

Regan, Sarah E., Lee, Robert J., MacLeod, Donald I. A. and Smithson, Hannah E. (2018) Are hue and saturation carried in different neural channels? Journal of the Optical Society of America A: Optics, Image Science and Vision, 35 (4). B299-B308. ISSN 1084-7529

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Chromatic discrimination data show that a smaller physical stimulus change is required to detect a change in hue than to detect a change in saturation [Palette 30, 21 (1968); Proc. R. Soc. London Ser. B 283, 20160164 (2016)], and, on this basis, it has been suggested that hue and saturation are carried in different neural channels [Color Space and Its Divisions: Color Order from Antiquity to the Present (Wiley, 2003), p. 311].We used an adaptation paradigm to test explicitly for separate mechanisms, measuring hue and saturation detection thresholds before and after adaptation to hue and saturation stimuli. Within-condition adaptation did not elevate detection thresholds significantly more than between-condition adaptation. We therefore did not find psychophysical evidence for a neural channel that extracts hue thresholds more effectively than the neural channel or channels that determine saturation thresholds. ©

Keywords:Colour, Colour vision, Psychophysics, Vision, Vision adaptation
Subjects:C Biological Sciences > C800 Psychology
Divisions:College of Social Science > School of Psychology
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ID Code:31592
Deposited On:10 Apr 2018 09:45

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