Figure 4.

Effects of contrast on motion direction discriminations for participants with TD and ASD. A, Effect of increasing stimulus contrast on direction discrimination thresholds for small moving stimuli. This plot is constructed by combining the leftmost data points in Figure 2A and Figure 3A and replotting these data as a function of stimulus contrast. B, Same as in A, except that only data from participants who completed both low- and high-contrast experiments are included. Error bars in both panels represent SEM.