Cochlear implants in young children: the relationship between speech perception and speech intelligibility

Area of Science:

• Pediatric audiology
• Speech-language pathology
• Otolaryngology

Background:

• Profound congenital and prelingual deafness significantly impacts speech development.
• Cochlear implantation is a key intervention for restoring auditory function in children.
• Understanding the trajectory of speech development post-implantation is critical for long-term outcomes.

Purpose of the Study:

• To investigate the relationship between speech perception and speech production in young children following cochlear implantation.
• To determine if early speech perception abilities can predict later speech intelligibility.

Main Methods:

• A prospective study followed 126 children with profound deafness pre-implantation and up to 20 children at 5-year follow-up.
• Speech perception and intelligibility were assessed using hierarchical rating scales.
• Spearman rank correlation coefficients were used to analyze the relationship between perception and production measures.

Main Results:

• Speech intelligibility at 5 years strongly correlated with speech perception at 2, 3, 4, and 5 years post-implantation (Spearman coefficients 0.77-0.58, p < 0.01).
• Earlier speech intelligibility also correlated with earlier speech perception abilities (p < 0.01).

Conclusions:

• Speech intelligibility in young children with profound deafness, 2-5 years post-cochlear implantation, can be predicted by earlier speech perception measures.
• These findings highlight the importance of early auditory development for long-term speech outcomes.