Variation of chromatic discrimination across the lifespan

Paramei, Galina V. and Oakley, Beata (2014) Variation of chromatic discrimination across the lifespan. Journal of the Optical Society of America A, 31 (4). A375-A384. ISSN 1084-7529

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The present study, an extension of Paramei (J. Opt. Soc. Am. A, 29, A290, 2012), provides normative data on chromatic discrimination, using the Cambridge Colour Test, for normal trichromats aged 10–88 years. Findings are in accord with a two-phase variation across the lifespan: chromatic sensitivity improves in adolescence, reaches a maximum around 30 years, and then undergoes a gradual decrease. Indicative parameters are Protan (P), Deutan (D) and Tritan (T) vector lengths; and major axes and axis ratios of Ellipses. Trivector data are modeled as non-monotonic combinations of power functions, with goodness-of-fits R2P=0.23, R2D=0.23, R2T=0.45. For advancing age, sensitivity decline in all chromatic systems was confirmed, though with a marked acceleration after 60 years (reflected by the power function exponent > 1) and more pronounced for the Tritan system.

Item Type: Article
Additional Information and Comments: © 2014 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited
Keywords: Color vision; Chromatic discrimination; The Cambridge Colour Test; Aging changes; Psychophysics
Faculty / Department: Faculty of Science > Psychology
Depositing User: Philippe Chassy
Date Deposited: 17 Sep 2015 13:24
Last Modified: 18 Apr 2016 08:48

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