FIG. 3.

Results of experiment 1. Weber fractions (PRDL/base rate) at different base rates for the single-electrode condition (X markers), 18-electrode burst condition (solid markers) and 18-electrode spread condition (open markers) are shown. The seven panels show individual relative PRDLs for seven participants measured at base rates of 100, 200, 300, 400, 500 and 600 pps with error bars indicating one standard deviation. Eighteen-electrode burst mode was not measured for S24, and all other missing data points were rates for which the PRDL could not be measured.