Fig. 5.

A, Mean RMS-difference errors ± 95% confidence intervals computed for each cue manipulation condition across the population of LSO cells for which each condition was run (N = 149). Small errors indicate that the SRF measured in the cue-manipulation condition closely approximated the SRF measured in the normal condition. The table to the right indicates for each condition whether the cue was held fixed (0) or allowed to vary naturally (+) with changes in the azimuth of the sound source. In the ipsi-only condition, ITD and ILD are undefined, and the corresponding spots are left blank in the table. B, Mean RMS-difference errors ± 95% confidence intervals for the ILD varying conditions (0-ITD, 0-ISD, and Δ-ILD), the ipsi-only condition, and the ILD fixed conditions (Δ-ITD, Δ-ISD, and 0-ILD). Smallest errors across the population of cells occurred for those conditions where ILD varied naturally with azimuth, whereas the largest errors occurred when ILD was held fixed.