出版社：Faculdade de Psicologia, Pontifícia Universidade Católica do Rio Grande do Sul
摘要：The aim of this work was to measure and compare mesopic contrast sensitivity curves for radial (rCSF) and sine-wave gratings (CSF) stimuli of 0.25, 0.5, 1 and 2 cpd in deaf children between the ages of 7 to 12 years. We measured the contrast thresholds of 10 children using the psychophysical forced-choice method and mean luminance of 0.7 cd/m2. All participants were free of ocular diseases and had normal acuity. The results showed that contrast sensitivity of the deaf children was higher for sine-wave gratings (CSF) than radial stimuli (rCSF). These results suggest that these two stimuli can be processed by different visual cortical areas.
关键词：percepção visual;sensibilidade ao contraste;crianças surdas;freqüência radial e espacial;método da escolha forçada.
