Colour categories are reflected in sensory stages of colour perception when stimulus issues are resolved | Zendy

Lewis Forder | Zendy; Xun He | Zendy; Anna Franklin | Zendy

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Colour categories are reflected in sensory stages of colour perception when stimulus issues are resolved

Author(s) -

Lewis Forder,

Xun He,

Anna Franklin

Publication year - 2017

Publication title -

plos one

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.99

H-Index - 332

ISSN - 1932-6203

DOI - 10.1371/journal.pone.0178097

Subject(s) - stimulus (psychology) , chromatic scale , perception , categorization , psychology , categorical perception , color vision , audiology , sensory system , oddball paradigm , event related potential , visual perception , achromatic lens , categorical variable , cognitive psychology , visual processing , communication , mathematics , artificial intelligence , neuroscience , medicine , computer science , cognition , speech perception , physics , optics , statistics , combinatorics

Debate exists about the time course of the effect of colour categories on visual processing. We investigated the effect of colour categories for two groups who differed in whether they categorised a blue-green boundary colour as the same- or different-category to a reliably-named blue colour and a reliably-named green colour. Colour differences were equated in just-noticeable differences to be equally discriminable. We analysed event-related potentials for these colours elicited on a passive visual oddball task and investigated the time course of categorical effects on colour processing. Support for category effects was found 100 ms after stimulus onset, and over frontal sites around 250 ms, suggesting that colour naming affects both early sensory and later stages of chromatic processing.

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