J Am Acad Audiol 2005; 16(01): 042-053
DOI: 10.3766/jaaa.16.1.5
American Academy of Audiology. All rights reserved. (2005) American Academy of Audiology

Discrimination of Speech Sound Contrasts Determined with Behavioral Tests and Event-Related Potentials in Cochlear Implant Recipients

A.J. Beynon
A.F.M. Snik
D.F. Stegeman
P. van den Broek
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Publication Date:
07 August 2020 (online)

Cortical potentials evoked with speech stimuli were investigated in ten experienced cochlear implant (CI, type Nucleus 24M) users using three different speech-coding strategies and two different speech contrasts, one vowel (/i/-/a/) and one consonant (/ba/-/da/) contrast. On average, results showed that, compared to subjects with normal hearing, P300 amplitudes were smaller; however, most latencies were within the normal range. Next, individual P300 measures in response to the two speech contrasts were compared to behavioral discrimination scores. Significant within-subject differences in P300 amplitudes and latencies were found for the three speech coding strategies. These differences were in agreement with the behavioral, strategy-dependent discrimination of the speech contrasts.