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Semantic impairment disrupts perception, memory, and naming of secondary but not primary colours

Rogers, Timothy T., Graham, Kim Samantha and Patterson, Karalyn 2015. Semantic impairment disrupts perception, memory, and naming of secondary but not primary colours. Neuropsychologia 70 , pp. 296-308. 10.1016/j.neuropsychologia.2015.01.010

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Abstract

To investigate how basic aspects of perception are shaped by acquired knowledge about the world, we assessed colour perception and cognition in patients with semantic dementia (SD), a disorder that progressively erodes conceptual knowledge. We observed a previously undocumented pattern of impairment to colour perception and cognition characterized by: (i) a normal ability to discriminate between only subtly different colours but an impaired ability to group different colours into categories, (ii) normal perception and memory for the colours red, green, and blue but impaired perception and memory for colours lying between these regions of a fully-saturated and luminant spectrum, and (iii) normal naming of polar colours in the opponent-process colour system (red, green, blue, yellow, white, and black) but impaired naming of other basic colours (brown, gray, pink, and orange). The results suggest that fundamental aspects of perception can be shaped by acquired knowledge about the world, but only within limits.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Systems Immunity Research Institute (SIURI)
Publisher: Elsevier
ISSN: 0028-3932
Funders: MRC
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 7 January 2015
Last Modified: 05 Mar 2019 15:12
URI: http://orca.cf.ac.uk/id/eprint/72243

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