FIG. 2.

Effect of stimulus duration and signal envelope on ILD sensitivity. A Unmodulated broadband noise. Mean thresholds across subject are plotted for an initial testing period (red line) as well as a second testing period (black line) completed following more than 16 weeks of ITD and ILD testing. Data for individual animals are denoted by symbols of the same color (each of these data points shows the mean threshold across at least three testing sessions). In the time between the two test periods shown, animals received extensive training on both ITD and ILD tasks using a variety of different stimuli. B Thresholds for sinusoidally amplitude modulated noise. Continuous line shows mean thresholds across subjects; symbols show data for individual subjects. To aid comparison across envelope types, dotted lines show the mean of the two lines displayed in panel A. C Estimates of response bias collapsed across signal type. Each gray symbol shows data obtained for a single subject and signal type. The black line shows estimates of bias averaged across different subjects and signal types, and plotted as a function of duration.