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Research study: Colour discrimination, colour naming and colour preferences among individuals with Alzheimer's disease.

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By Wijk H, Berg S, Sivik L, Steen B. • www.ProHealth.com • December 1, 1999


OBJECTIVE: To study the ability of colour naming, colour discrimination and colour preference in Alzheimer's disease (AD).

DESIGN: Descriptive, consecutive sample.

PARTICIPANTS: Fifty subjects >65 years with AD.

INTERVENTIONS: Testing colour discrimination, colour naming and colour preferences. Main outcome measures. Ability to detect colour differences in the yellow, red, blue and green areas, ability to assign a name to 22 colour samples, ability to rank seven colours in order of preference. Main results-- Discrimination ability was significantly better in the yellow and red area and for lightness variations. Cognitive decline had a significant impact on naming mixed colours and using elaborate colour names. Severity of dementia did not affect the preference rank order of colours.

CONCLUSIONS: Ability to discriminate is affected in AD, with most errors in the blue and green area. Naming colours shows a cognitive decline. Preferences for colour are stable despite the disease.

Copyright 1999 John Wiley & Sons, Ltd.

Source:
Int J Geriatr Psychiatry 1999 Dec;14(12):1000-1005.
Department of Geriatric Medicine, Goteborg University, Goteborg, Sweden.

PMID: 10607966




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