Effect of duration of deafness

An analysis of variance showed that the duration of auditory deprivation had an effect on the latencies of wave IIIe (F = 19.8, df = 3, p < 0.05) and wave Ve (F = 4.3, df = 3, p = 0.041). However, this effect was not significant for interval IIIe-Ve (F = 1.2, df = 1, p = NS). Influence of the duration of deafness on EABR latency is illustrated by Figure 10. ANOVAs normality tests passed for wave IIIe (p = 0.012), Ve (p > 0.05) and interval IIIe-Ve (p > 0.05), while equal variance tests failed for wave IIIe (p < 0.001) and passed for wave Ve (p > 0.05) and interval IIIe-Ve (p > 0.05).

Figure 10. Mean latencies of wave IIIe (a), wave Ve (b), and interval IIIe-Ve (c) averaged across subjects and electrode sites in function of the duration of deafness groups. Vertical bars show the standard error around each mean. * represents significant differences among groups of electrodes (p < 0.05).