Using the Hard, Randy, and Rittler Test to Evaluate Color Vision in Capuchins (Cebus libidinosus)

Autor(es)

Altavini, Tiago Siebert ^{[1, 2]} ; Henriques, Leonardo Dutra ^{[3, 4, 1, 2]} ; Oliveira Bonci, Daniela Maria ^{[3, 4]} ; Nagy, Balazs Vince ^{[3, 4]} ; Ventura, Dora Fix ^{[3, 4]} ; Pessoa, Valdir Filgueiras ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Brasilia, Neurosci Lab, BR-70910 Brasilia, DF - Brazil

^[2] Univ Brasilia, Behav & Primate Ctr, BR-70910 Brasilia, DF - Brazil

^[3] Univ Sao Paulo, Dept Expt Psychol, Inst Psychol, BR-66281 Sao Paulo - Brazil

^[4] Univ Sao Paulo, Ctr Neurosci & Behav, BR-66281 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF PRIMATOLOGY; v. 33, n. 6, p. 1467-1476, DEC 2012.
• Citações Web of Science: 3

Resumo

The identification of color vision types in primates is fundamental to understanding the evolution and biological function of color perception. The Hard, Randy, and Rittler (HRR) pseudoisochromatic test categorizes human color vision types successfully. Here we provide an experimental setup to employ HRR in a nonhuman primate, the capuchin (Cebus libidinosus), a platyrrhine with polymorphic color vision. The HRR test consists of plates with a matrix composed of gray circles that vary in size and brightness. Differently colored circles form a geometric shape (X, O, or Delta) that is discriminated visually from the gray background pattern. The ability to identify these shapes determines the type of dyschromatopsy (deficiency in color vision). We tested six capuchins in their own cages under natural sunlight. The subjects chose between two HRR plates in each trial: one with the gray pattern only and the other with a colored shape, presented on the left or right side at random. We presented the test 40 times and calculated the 95 % confidence limits for chance performance based on the binomial test. We also genotyped all subjects for exons 3 and 5 of the X-linked opsin genes. The HRR test diagnosed two subjects as protan dichromats (missing or defective L-cone), three as deutan dichromats (missing or defective M-cone), and one female as trichromat. Genetic analysis supported the behavioral data for all subjects. These findings show that the HRR test can be applied to diagnose color vision in nonhuman primates. (AU)

• Processo FAPESP: 09/06026-6 - Estudo psicofísico e genético das deficiências da visão de cores em humanos com diferentes patologias
• Beneficiário: Dora Selma Fix Ventura
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 08/58731-2 - A visão como indicador de processos lesivos na retina e no sistema nervoso central
• Beneficiário: Dora Selma Fix Ventura
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 11/17423-6 - Estudo dos pigmentos visuais de primatas do Novo Mundo e análise de marcadores genéticos para retinopatia diabética
• Beneficiário: Daniela Maria Oliveira Bonci
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado