Related Experiment Videos
Colour discrimination, colour naming and colour preferences among individuals with Alzheimer's disease
1Department of Geriatric Medicine, G]oteborg University, G]oteborg, Sweden. helle.wijk@geriatrik.gu.se
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.