Do Acoustic Environment Characteristics Affect the Lexical Development of Children With Cochlear Implants? A Longitudinal Study Before and After Cochlear Implant Activation

Author:

Majorano Marinella1ORCID,Brondino Margherita1,Guerzoni Letizia2,Murri Alessandra2,Ferrari Rachele1,Lavelli Manuela1,Cuda Domenico2,Yoshinaga-Itano Christine3,Morelli Marika1,Persici Valentina1ORCID

Affiliation:

1. Department of Human Sciences, University of Verona, Italy

2. Otorhinolaryngology Unit, “Guglielmo da Saliceto” Hospital, Piacenza, Italy

3. Institute of Cognitive Science, University of Colorado Boulder

Abstract

Purpose This study investigates the acoustic environment of children with cochlear implants (CIs) and the relationship between exposure to speech, in noise and in quiet, and the children's lexical production up to 1 year after CI activation, while controlling for the effect of early individual differences in receptive vocabulary growth. Method Eighteen children with CIs were observed at 3, 6, and 12 months after CI activation. Children's spontaneous word production during interaction with their mothers (types and tokens) and their expressive and receptive vocabulary size were considered. The characteristics of the acoustic environments in terms of acoustic scenes (speech in noise or in quiet, quiet, noise, music, and other) and of loudness ranges were assessed using data logging of the children's devices. Results Data analysis showed that both the number of tokens and the number of types produced 1 year after CI activation were affected by the children's exposure to speech in quiet with a loudness range between 40 and 69 dB. Expressive vocabulary size and types were affected by the receptive vocabulary knowledge that the children achieved over the first 3 months after CI activation. Conclusions Our data support the role of speech environment and individual differences in early comprehension on lexical production. The importance of exposure to speech with particular characteristics for the lexical development of children with CIs and the implications for clinical practice are discussed.

Publisher

American Speech Language Hearing Association

Subject

Speech and Hearing

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