Fig. 5: Visibility thresholds and saccade kinematics covary across amplitudes, directions, and individuals.
From: Lawful kinematics link eye movements to the limits of high-speed perception
Correlation between visibility thresholds (obtained from individuals' psychometric functions for a given amplitude and direction) and saccade kinematics (obtained from the prediction of individuals' main sequence for a given amplitude and direction) for a absolute movement speed and b absolute movement duration in Experiment 3 (left) and Experiment 4 (right). Data were obtained from N = 6 and N = 36 observers completing a total of 48,553 trials and 47,817 trials in Experiments 3 and 4, respectively. Each gray dot is one combination of observer, direction (Experiments 3 and 4), and amplitude (Experiment 3). Colored data points show the mean across observers for each combination of amplitude and direction. To facilitate comparison, thresholds are plotted against the corresponding kinematic of the saccade in the opposite direction, matching retinal motion direction. Rank correlations (Spearman’s ρ) are shown in side panels. Matching spatial (gray) rather than retinal direction (black) provides a baseline for comparison. Error bars are bootstrapped 95% confidence intervals across observers. Solid white lines in the background indicate correlations with zero-intercept and various slopes.
