Figure 3.

Control stimulus conditions to further test the hypothesis that CMR is associated with auditory grouping. (a) Conditions with gap and postcursors (GPC, left) where the first postcursor was eliminated, and with off-frequency postcursors (OPC, right) where the postcursors were presented at intermediate frequencies. The last letter C in the abbreviations indicates that the comodulated condition is shown. (b) Mean masked thresholds and standard errors (left panel) are shown for the different stimulus conditions. The corresponding amounts of CMR for the conditions GP and OP are shown in the right panel. Dark-gray bars indicate the conditions R-GPC and R-OPC and light-gray bars indicate the conditions GPR-GPC and OPR-OPC.