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The Effects Of Alcohol On Different Classes Of Motion Perception, Steven J. Matson

Electronic Thesis and Dissertation Repository

We used a psychophysical approach to investigate how alcohol affected visual sensitivity to perceive different classes of motion. Visual sensitivities were measured in both a non-alcohol and an alcohol condition for three classes of motion: Minimum Motion, Simple Motion, and Complex Motion. Perceptual thresholds, taken as the degree of motion at which an observer responded correctly with an accuracy of 75%, or Weber fractions were compared between the non-alcohol and the alcohol conditions. For Simple and Complex motion, similar comparisons were made as a function of speed (e.g., 2°s^-1, 6°s^-1, and 12°s^-1). Perceptual thresholds …