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Contrast detection thresholds and oculomotor measures. The data were obtained from the spatial frequency and contrast sensitivity (psychophysics) experiments, for the spatial frequencies of 1, 2, 3, 4, 6, and 8 cyc/°; they were converted to Z-values per observers by subtracting the mean and dividing by the standard deviation. Note the similar trend for all displayed parameters. The maximum velocity values are multiplied by −1 to point out the trend.
