There were significant differences between the two groups with SNHL and TCHL. The mean latency of wave V 20 dB above threshold was 1 msec shorter in those with SNHL compared with those with TCHL. There were significant differences between children with PCHL and SNHL but no difference between those with PCHL and TCHL. When a criterion of < 7.6 msec was chosen to predict the presence of SNHL the test sensitivity was 0.98, test specificity 0.71, and POSITIVEpredictive value was 0.66. Nine out of 10 of those with a latency 20 dB above threshold of < 7.0 msec had an SNHL.