Absence of binocular summation, eye dominance, and learning effects in color discrimination

We evaluated binocular summation, eye dominance, and learning in the Trivector and Ellipses procedures of the Cambridge Colour Test (CCT). Subjects (n = 36, 18–30 years old) were recruited among students and staff from the University of São Paulo. Inclusion criteria were absence of ophthalmological...

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Vydáno v:	Visual neuroscience Ročník 23; číslo 3-4; s. 461 - 469
Hlavní autoři:	COSTA, MARCELO FERNANDES, VENTURA, DORA FIX, PERAZZOLO, FELIPE, MURAKOSHI, MARCIO, SILVEIRA, LUIZ CARLOS DE LIMA
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York, USA Cambridge University Press 01.05.2006
Témata:	Adolescent Adult Analysis of Variance Binocular summation CHROMATIC CODING Chromatic discrimination Color Perception - physiology Color Perception Tests - methods Color vision Discrimination (Psychology) - physiology Dominance, Ocular - physiology Eye dominance Eyes & eyesight Female Females Gender differences Humans Learning - physiology Male Photic Stimulation - methods Psychophysical detection threshold Rheumatoid arthritis Scholarships & fellowships Sensory Thresholds - physiology Sex Factors Vision, Binocular - physiology Chromatic discrimination Binocular summation Eye dominance Color vision Psychophysical detection threshold
ISSN:	0952-5238, 1469-8714
On-line přístup:	Získat plný text
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Shrnutí:	We evaluated binocular summation, eye dominance, and learning in the Trivector and Ellipses procedures of the Cambridge Colour Test (CCT). Subjects (n = 36, 18–30 years old) were recruited among students and staff from the University of São Paulo. Inclusion criteria were absence of ophthalmological complaints and best-corrected Snellen VA 20/20 or better. The subjects were tested in three randomly selected eye conditions: binocular, monocular dominant eye, and nondominant eye. Results obtained in the binocular and monocular conditions did not differ statistically for thresholds measured along the protan, deutan, and tritan confusion axes (ANOVA, P > 0.05). No statistical difference was detected among discrimination ellipses obtained in binocular or monocular conditions (ANOVA, P > 0.05), suggesting absence of binocular summation or of an effect of eye dominance. Possible effects of learning were examined by comparing successive thresholds obtained in the three testing conditions. There was no evidence of improvement as a function of testing order (ANCOVA, P > 0.05). We conclude that CCT thresholds are not affected by binocularity, eye dominance, or learning. Our results differ from those found by Verriest et al. (1982) using the Farnsworth-Munsell 100 Hue test and Hovis et al. (2004) using the Farnsworth-Munsell panel D-15 test.
Bibliografie:	PII:S095252380623311X ark:/67375/6GQ-MT58ZZHS-J PMID:16961981 istex:4A6647944AF5583DBF8EF0C7C8F1249CE5A67ED9 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 content type line 23
ISSN:	0952-5238 1469-8714
DOI:	10.1017/S095252380623311X