Effect of duration of deafness on ELAR latency

Analysis of variance showed that the duration of auditory deprivation had an effect on the latencies of N1 (F = 22.2, df = 1, p < 0.001), P2 (F = 67.7, df = 1, p < 0.001), and interval N1-P2 (F = 27.8, df = 1, p < 0.001). Influence of the duration of deafness on ELAR latency is illustrated by Figure 8.Note that subjects in deafness duration group D1 had significantly better speech perception scores than subjects in group D2 and that the results found for the effects of deafness duration on ELAR latency are therefore also applicable for speech perception scores.

Figure 8. Mean latencies of N1 (a), P2 (b), and interval N1-P2 (c) averaged across subjects and electrode sites as a function of the duration of deafness / speech performance groups. Group D1: subjects have less than 8 years of deafness duration (and better speech perception scores). Group D2: subjects have more than 8 years of deafness duration (and poorer speech perception scores). Vertical bars show the standard error around each mean.
Figure 8. Mean latencies of N1 (a), P2 (b), and interval N1-P2 (c) averaged across subjects and electrode sites as a function of the duration of deafness / speech performance groups. Group D1: subjects have less than 8 years of deafness duration (and better speech perception scores). Group D2: subjects have more than 8 years of deafness duration (and poorer speech perception scores). Vertical bars show the standard error around each mean. * represents significant differences between groups (p < 0.05).