Behavioural and event-related potential responses to lightness contrast and assimilation. Abstract only.

TAROYAN, Naira, ACASTER, Stephanie, SORANZO, Alessandro and REIDY, John (2019). Behavioural and event-related potential responses to lightness contrast and assimilation. Abstract only. Perception, 48 (S1), p. 90.

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Abstract

Contrast and assimilation show that the colour of a surface depends on surrounding areas. In contrast, a surface is perceived lighter when next to a dark surface, and darker next to a light surface, vice-versa in assimilation. Previous event-related potential (ERP) research showed that the White effect associates with early ERP differences. In this study, participants viewed a grey target with black/ white inducers designed to elicit contrast/assimilation, respectively, and indicated whether the target was darker/lighter than an equiluminant comparison. Behavioural performance was more efficient to contrast stimuli with white inducers and to assimilation stimuli with black inducers. Brain activation, indicated by P1 amplitude, was larger to contrast stimuli with black inducers than those with white inducers. Differences in processing contrast/assimilation between stimuli with black and white inducers may reflect differences in the two phenomena.

Item Type:	Article
Additional Information:	41st European Conference on Visual Perception (ECVP) 2018 Trieste August 26-30
Uncontrolled Keywords:	Experimental Psychology; 1701 Psychology; 1702 Cognitive Sciences
Identification Number:	https://doi.org/10.1177/0301006618824879
Page Range:	p. 90
SWORD Depositor:	Symplectic Elements
Depositing User:	Symplectic Elements
Date Deposited:	19 Jun 2019 11:28
Last Modified:	18 Mar 2021 05:08
URI:	https://shura.shu.ac.uk/id/eprint/24730

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