Fig. 5.

Reaction times (RTs) to tones as a function of tone levels for the two noise conditions. A: averaged RTs for monkey D. In panel at left, RTs recorded when 0 dB sound pressure level (SPL) bursts of noise were presented (green symbols) versus RTs observed when the noise masker consisted of a distribution of noise amplitudes (gray symbols). In panel at right, RTs are shown for noise levels of 30 dB SPL. B: summary of y-intercepts and RT slopes for both monkeys. Error bars represent the 95% confidence interval.