Back to Article Fig. The data are the average of five subjects. The error bars represent standard errors. Back to Article Fig. 4. Average Vernier thresholds for vertically separated dot and irregular shape targets.
Different symbols represent thresholds for targets of different area, in square arc-min.
The error bars represent standard errors. Back to Article Fig. 5. Motion thresholds as a function of target velocity during pursuit of smooth and sampled horizontal motion of the entire target. The target was a 1 deg x 1 deg cosine grating of 2.3 cpd at 50 percent contrast. The amplitude of each motion step was either 0.02 or 0.16 deg.