Evaluation of the language development of children with cochlear implant users living in a multilingual environment

To evaluate the effect of second language exposure on Turkish speaking skills in cochlear implant (CI) users.

Children living in mono and bilingual families, who underwent unilateral cochlear implant due to congenital severe to profound, or profound hearing loss, were examined. The fifty six children with a chronological age younger than 8 and a language age of 2-6 years were included the study. The Denver II Developmental Screening Test was used for identifying of pre-implant speech and development. The duration of implant use was also documented. Languages spoken at the patients' homes were divided into 4 categories: T/K: Predominantly Turkish/Kurdish, K/T: Predominantly Kurdish/Turkish, T/T: Just Turkish, A/T: Predominantly Arabic/Turkish. The CAP (Categories of Auditory Performance), SIR (Speech Intelligibility Rating), The Turkish Version Test of The Early Language Development (TELD-3:T),. The IT-MAIS (Infant Toddler Meaningful Auditory Integration Scale), MUSS (Meaningful Use of Speech Scale) were used to evaluate the language development of the patients. Changes in IT-MAIS and MUSS scores in the last two years were also evaluated.

The all children received their implants before age of 6 years. The average duration of cochlear implant use of children was 38,43 ± 11,64 months. The mean pre-implant speech age was 6,8 ± 2,13 months. There was no significant difference between the groups in terms of the CAP and SIR scores. In TELD-3:T scores, there was no significant difference between the groups except for the receptive raw scores. The Arabic/Turkish group had significantly lower receptive raw scores. This group also had significantly lower mother educational level. In IT-MAIS and MUSS scores, no significant difference was found between the groups.

Our study supports the opinion that exposure to a second language at home does not affect the acquisition of the language of education in children using CI.