Figure 7.

A–C, Scatter plots based on ROC curve analysis comparing frequency discrimination by IC neurons in the 90/10% condition versus the 50/50% condition, for Δf = 0.37, 0.10, and 0.04. Each dot represents one neuron, and the symbols indicate the repetition rate: triangles, 2/s; circles, 4/s; squares, 8/s. The number of data points above and below the diagonal is shown in an inset; dots above the diagonal mean better discriminability for the 90/10% condition than for 50/50%. D, Variation of the average discriminability (mean ± SD) depending on Δf. Solid lines, 90/10%; dashed lines, 50/50%; gray lines, data including all neurons in the sample; black lines, data taken from only the 10% most sensitive neurons.