Figure 12.

Choice probability in A1 neurons (n = 92). Values closer to 0 indicate increased activity for “feature-absent” response, whereas 1 indicates increased activity for “feature-present” response. Darker colored bars indicate cells with significant choice activity. Black dotted line indicates 0.5, red dashed line denotes the population median. A and B: CP during the ISI window was centered about 0.5 for both the attend AM condition (A; median = 0.49, P = 0.11, signed-rank test) and the attend BW condition (B; median = 0.51, P = 0.92, signed-rank test). CP during the attend AM condition is evenly distributed about 0.5 in both the stimulus window (C; median = 0.50, P = 0.87, signed-rank test) and the response window (E; median = 0.49, P = 0.43, signed-rank test). In the attend ΔBW condition, CP values tended to be less than 0.5 in both the stimulus window (D; median = 0.49, P = 0.02, signed-rank test) and the response window (F; median = 0.46, P = 4.2 e-8, signed-rank test). There was a significant difference in the population CP distributions between attention conditions during the RW (P = 0.004, signed-rank test), though not during the S2 (P = 0.06, signed-rank test). AM, amplitude modulation; A1, primary auditory cortex; BW, bandwidth; CP, choice probability; ISI, interstimulus interval; RW, response window; S2, second sound; ΔBW, bandwidth restricted. *indicates population median significantly different than 0.5, P < 0.05, signed-rank test.