Digit span recall error analysis in pediatric cochlear implant users.

Area of Science:

• Auditory Neuroscience
• Developmental Psychology
• Speech and Hearing Sciences

Background:

• Children with cochlear implants (CIs) often exhibit shorter digit spans compared to normal-hearing peers.
• Previous research suggests potential difficulties in auditory perception or central processing for CI users.
• Understanding the specific nature of memory deficits is crucial for targeted interventions.

Purpose of the Study:

• To analyze and compare error types in forward and backward digit span recall between pediatric CI users and normal-hearing children.
• To investigate the underlying reasons for reduced digit span performance in children with CIs.

Main Methods:

• 37 pediatric cochlear implant users (with ≥4.5 years of device experience) and age-matched normal-hearing children (8-10 years old) participated.
• Children completed forward and backward digit span recall tasks.
• Errors were classified into four categories: item, order, omission, or combination.

Main Results:

• Univariate ANOVA revealed significant main effects for error type, recall condition, and hearing ability.
• A significant interaction showed that order errors increased more in backward recall for both groups, but notably for CI users.
• Children with CIs demonstrated significantly more order errors compared to normal-hearing children.

Conclusions:

• Shorter digit spans in pediatric CI users are likely due to memory processing challenges, not primarily perceptual deficits.
• Difficulties in subvocal verbal rehearsal and serial scanning of short-term memory items contribute to recall limitations.
• Findings highlight the need for memory-focused rehabilitation strategies for children with cochlear implants.