Sequential or simultaneous bilateral cochlear implantation: attention, memory, and language skills in children

The effect of the inter-implant interval time on language and communication skills has been a subject of research for years in children with bilateral cochlear implants. This study aimed to investigate language and some attention and memory skills in children with bilateral sequential and simultaneous cochlear implants.

The study included a total of 40 children aged between 6 and 8 years old, grouping bilateral simultaneous cochlear implanted children, sequential implanted children with 0-2 years interval, sequential implanted children with 2-4 years interval, and normal hearing peers. The language skills of the children were assessed using the Test of Language Development: Primary 4th edition, their selective attention and coping skills with disruptive effect were evaluated using the Stroop test, sustained attention and visual-motor synchronization skills were assessed using the Cancellation Test, and short-term memory skills were evaluated using the Visual Auditory Digit Span Test. The findings were analyzed using nonparametric statistical methods, with a significance level set at 0.05.

Children with bilateral simultaneous cochlear implants demonstrated better performance in language skills and the attention-related subtests of the Stroop test (p < 0.05). On the other hand, children with simultaneous and sequential cochlear implants achieved similar scores in the Cancellation and the Visual Auditory Digit Span Test (p > 0.05).

Bilateral simultaneous cochlear implantation in children is beneficial for language, selective attention, and coping with the Stroop effect. However, these children may still lag behind their normal-hearing peers in terms of language, attention, and memory skills.