Variability in Receptive Language Development Following Bilateral Cochlear Implantation.

Area of Science:

• Pediatric audiology
• Developmental linguistics
• Otolaryngology

Background:

• Bilateral cochlear implantation (CI) is a critical intervention for congenital deafness.
• Understanding language development variability post-CI is essential for optimizing outcomes.
• Early implantation is hypothesized to positively influence language acquisition.

Purpose of the Study:

• To investigate language development variability in children aged 5-7.5 years after early bilateral CI (by age 2).
• To assess the impact of age at implantation on language outcomes.
• To explore the influence of non-cognitive and anatomical comorbidities on language development.

Main Methods:

• Retrospective study of 84 children with congenital deafness receiving simultaneous bilateral CI by 24 months.
• Evaluation of language comprehension using a standardized German test for preschool and early school-aged children.
• Assessment of speech perception for monosyllables and sentences in quiet and noise.

Main Results:

• Language acquisition aligned with the normal range for hearing children.
• Median performance was 75% for monosyllables, 89% in quiet sentences, and 54% in noisy sentences.
• Earlier implantation age significantly correlated with better monosyllabic word comprehension (p < .001).

Conclusions:

• Congenitally deaf children implanted bilaterally within the first year can achieve age-appropriate language skills.
• Variability in language acquisition is influenced by implantation age and potentially cognitive factors like working memory.