Speech intelligibility in deaf children after long-term cochlear implant use

Area of Science:

• Audiology
• Speech-Language Pathology
• Neuroscience

Background:

• Prelingual deafness presents significant challenges to speech development.
• Cochlear implants (CIs) offer a potential solution for restoring auditory function.
• Long-term outcomes of CI use in children require ongoing investigation.

Purpose of the Study:

• To investigate long-term speech intelligibility in prelingual deaf children using cochlear implants (CIs).
• To identify demographic and cognitive factors influencing speech intelligibility in pediatric CI users.
• To compare speech intelligibility in CI users with a normal-hearing control group.

Main Methods:

• Speech intelligibility assessed via playback to normal-hearing listeners.
• Study included 63 children, adolescents, and young adults with prelingual deafness and CI use >7 years.
• Hierarchical regression analysis used to examine contributing factors.

Main Results:

• Mean intelligibility scores in CI users were lower than controls, but most fell within the control range.
• Longer CI use correlated with poorer speech intelligibility, potentially due to earlier, more conservative candidacy criteria.
• Age at implantation and spoken language experience were significant predictors of intelligibility.

Conclusions:

• Factors influencing language development in typically hearing children also impact speech intelligibility in long-term CI users.
• Individual differences in speech outcomes are influenced by a complex interplay of factors.
• Further research is needed to optimize speech intelligibility for pediatric CI recipients.