Resumo

GADELHA, Maria José Nunes et al. Effects of aging on visual contrast of sinusoidal gratings. Psico (Porto Alegre) [online]. 2016, vol.47, n.3, pp. 209-215. ISSN 1980-8623.  http://dx.doi.org/10.15448/1980-8623.2016.3.22748.

The aim of this study was to compare the behavior of the contrast sensitivity curve and older adults. We measured the CFS for vertical sinusoidal gratings using the psychophysical forced-choice method (2AFC). Participants were 18 volunteers aged 20-29 years old (M = 23.94, SD = 2.57), and 18 elderly aged 60-69 years old (M = 66.05, SD = 3.65) of both sexes. The ANOVA showed main effects between groups [F_{(1, 156)} = 173.160; p < 0.001] and interaction between the frequencies and age [F_(3,427) = 163.365; p < 0.001]. But the Bonferroni showed significant differences in all tested frequencies (p < 0.001). It was found that the standard curve CS is maintained with aging, with the lowest sensitivity is located at the extreme bow and greater sensitivity is near the center of the curve. Furthermore, is suggested changes in visual sense perceptual process throughout life.

Palavras-chave : Psychophysical method; Perception; Visual contrast; Aging.

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