Correlations between FM and AM, diotic and dichotic, tasks. For all panels, filled circles correspond to individual thresholds at slow rates (f
m = 1 Hz) and open circles correspond to individual thresholds at fast rates (f
m = 20 Hz). Gray circles correspond to conditions where the x-axis represents thresholds with the fast rate, and the y-axis represents thresholds with the slow rate. a, b Modulated tasks believed to measure similar peripheral codes are well correlated, but c, d tasks believed to measure different peripheral codes are also well correlated.