Fig. 3.

(Left, top) Time–frequency plot of inter-trial phase locking for the frequency following response for participants with good versus poor perception of English consonants. Participants were divided into top and bottom halves based on performance on the consonant portions of the receptive phonology test. (Right, top) Time–frequency plot of inter-trial phase locking for the cortical response for good versus poor consonant perceivers. (Left, bottom) Inter-trial phase locking in the frequency following response as a function of frequency across the entire response (10–170 msec) for good (red) versus poor (blue) consonant perceivers. Error bars are one standard error of the mean. (Right, bottom) Inter-trial phase locking in the frequency following response as a function of frequency across the first 60 msec of the response for good versus poor consonant perceivers.