Related Experiment Video
Updated: May 1, 2026

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
Published on: March 24, 2023
[Phonological development in children with cochlear implant(s)]
1Klinik und Poliklinik für Hals-, Nasen- und Ohrenheilkunde, Uniklinik Köln, Cochlear Implant Centrum Köln, Gebäude 23, Kerpener Str. 62-68, 50931, Köln, Deutschland, katrin.kral@uk-koeln.de.
Background:
Normal-hearing children show signs of various phonological processes during language development. These processes represent simplifications of articulation, which are overcome at different time points. For the German language, there are currently no reliable data regarding whether these developmental stages also apply to deaf children with cochlear implants (CI).
Materials And Methods:
Phonological development in deaf children with CI was examined and evaluated with the PLAKSS ("Psycholinguistischen Analyse kindlicher Sprechstörungen"). The results of this analysis (time of test 1 = T1, n = 33) were compared to those of a PLAKSS diagnostic evaluation performed 1 year previously (time of test 0 = T0, n = 31).
Results:
At T1, 76 % of the whole group showed a phonological development that did not correspond to their hearing age (as measured from the time of the first CI implantation). The most frequently observed phonological processes were the reduction of consonant clusters and fronting. However, 83 % of the group had fewer phonological processes inappropriate to their hearing age at T1 than they did at T0.
Conclusion:
The phonological development of children with CI is not equivalent to their hearing age and is structured differently to that of normal-hearing children.
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