Visual perception of radial sine-wave grating after the alcohol consumption

Visual perception of radial sine-wave grating after the alcohol consumption

Journal Article

2011

Psicologia USP

22

1

99 - 115

2011

01036564 (ISSN)

The aim of this study was to compare the visual perception of contrast in adults with no alcohol intake, and after moderate consumption of alcohol by them - 0.09% Blood Alcohol Concentration (BAC), through the Contrast Sensitivity Function (CSF). Participated in the experiments five volunteers, aged 21-30 years, with normal or corrected visual acuity. To measure the CSF, we used radial sine-wave grating stimuli of frequencies of 0.25; 2 e 8 cycles per degree of visual angle. We used an experimental design or sketch, with repeated measures, and a forced-choice psychophysical method. The results showed significant effect of subjects (F4,55 = 25,518; p < 0,001), of frequencies (F2, 110 = 172,288; p < 0,001), and of the interaction between frequencies versus conditions versus subjects (F8, 110 = 26,806; p < 0,001). This preliminary study suggests changes in CSF, related to moderate alcohol consumption.