Navegando por Assunto "Condicionamento operante"

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Um teste computadorizado para a avaliação de visão de cores em crianças e sujeitos não-verbais baseado no teste de discriminação de cores de Mollon-Reffin
(Universidade Federal do Pará, 2008-12-16) GOULART, Paulo Roney Kilpp; SILVEIRA, Luiz Carlos de Lima; http://lattes.cnpq.br/9383834641490219; GALVÃO, Olavo de Faria; http://lattes.cnpq.br/7483948147827075
The present study aimed at providing conditions for the assessment of color discrimination in children using a modified version of the Trivector mode of the Mollon-Reffin color discrimination test. Since the task of indicating the gap of the Landolt C used in that test proved counterintuitive and/or difficult for young children to understand the target stimulus was changed to a square patch of color the subjects were asked to touch. The Trivector test measures color discrimination for the protan, deutan and tritan confusion lines. Experiment I sought to evaluate the correspondence between the CCT and the child-friendly adaptation with adult subjects (n=29) with normal color vision. Comparison of the thresholds obtained with both tests using Bland-Altman statistical methods showed good agreement between the two test versions. Experiment II tested the child-friendly software with children 2 to 7 years old (n=25) using operant training techniques for establishing and maintaining the subjects‟ performance. Color discrimination thresholds were progressively lower as age increased. The protan and deutan thresholds were consistently lower than tritan thresholds, a pattern repeatedly observed in adults tested with the CCT. The results demonstrate that the test is fit for assessment of color discrimination in young children and may be a useful tool for the establishment of color vision thresholds during development, as well as for use with other human populations, as well as with other primate species. (CNPq, FINEP).