This work concerns the relationship between two measures of auditory processing and several measures of cognitive abilities. The discriminabilities of formant transitions in synthesized consonant–vowel syllables were collected from over 100 children aged 7–11. Specifically, the discriminabilities of the F3 onset frequencies were measured in a set of stimuli which ranged perceptually from /dopen aye/ from /gopen aye/. Also, the discriminabilities of the onset transition durations of F1, F2, and F3 were measured in stimuli which ranged perceptually from /bopen aye/ to /wopen aye/. A PEST adaptive tracking paradigm was employed to make these measurements. The average just noticeable difference was 101 Hz for the F3 onset frequencies and 6 ms for the F1, F2, and F3 frequency ramps. A battery of tests of cognitive ability were administered to the same children. The cognitive ability tests revealed a wide range of scores in the subjects tested. A correlational analysis of these data indicated that better onset ...