FIG. 3.

Non- and forward-masked detection thresholds at the probe stimulation sites. The filled triangles indicate non-masked probe thresholds and the open triangles indicate probe thresholds in the presence of a forward masker that was placed basal to, at, or apical to the probe location (from left to right). The up-pointing triangles represent data measured at stimulation sites with the steep MPI, whereas the down-pointing triangles represent data measured at stimulation sites with the shallow MPI. Note that the number of masker sites was limited in cases where the probe site was close to either end of the electrode array. The conditions left to 0 mm in the figure were masker sites basal to the probe site.