Fig. 4.

Effect of AV-background of A-saccades. a, b Stimulus–response plots of A-saccade endpoints against a stimulus azimuth and b elevation. Blue/black symbols: A/A_NOBG. c Cumulative SRT probability functions for the A_NOBG- (black line), A₆-, A₁₂-, A₁₈-, and A₂₁ saccades. d Absolute localization error plotted as a function of SRT. Data pooled across subjects. Ellipses circumscribe 2 SD around the mean. e Response gains for azimuth (gray circles; black: mean across subjects) and elevation (cyan squares; blue: mean across subjects) of primary A-saccades as a function of SNR. f Final saccade response gains for V- (red) and A-saccades