Comparison of two computerized procedures for the assessment

Color vision consists of the discrimination of objects based on their spectral composition. Among primates, the majority ofPlatyrrhini monkeys are estimated to have polymorphic and sex-linked dichromacy. The objective of this study was to comparethe results produced by different equipment and software for the assessment of tri- and dichromatic conditions in one maleand two female Cebus apella. Three experiments were programmed. In Experiment 1, verifying the trichromatic condition ofone female subject and dichromatic condition of the remainder of the subjects was possible using an adapted version of the Cambridge Colour Test. Experiment 2 confirmed the results of Experiment 1 using a different array of stimuli of the same test.Experiment 3, which produced results similar to Experiment 2, consisted of a test developed for a standard computer systemusing stimuli with color properties similar to the ones used in the previous experiment. Favorable conditions for the assessmentof color vision in Platyrrhini can be built with low-cost equipment and software. Once data have been gathered with additional subjects and new stimulus arrangements have been tested and confirmed, the procedure can be used for the evaluation of other Platyrrhini species for which behavioral color discrimination data are currently lacking.