Figure 10.
Identification rates for mean data of HI and NH listeners in Experiment 4 are plotted in the left and right panels, respectively. Probability of responding /ada/ as a function of F2- onset frequency is plotted separately for each vowel tilt. Circles, asterisks, squares, x’s, and triangles represent mean data for vowel tilts of −12, −9, −6, −3, and 0 dB/oct., respectively. Maximum-likelihood fits of identification rates are displayed for mean data at each vowel tilt as different lines (see legend).