Behavioral and Cortical Activation Changes in Children Following Auditory Training for Dichotic Deficits

Area of Science:

• Neuroscience
• Audiology
• Developmental Psychology

Background:

• Children with dichotic listening deficits often struggle with binaural processing and speech perception in noise.
• Auditory rehabilitation aims to improve auditory processing skills and address listening challenges.

Purpose of the Study:

• To investigate the effects of Auditory Rehabilitation for Interaural Asymmetry (ARIA) training on behavioral performance and cortical activation in children with dichotic listening deficits.
• To determine if ARIA training leads to improvements in dichotic listening, speech-in-noise perception, and frequency pattern identification.

Main Methods:

• A one-group pretest-posttest design was employed.
• Participants underwent ARIA training, a protocol designed to enhance binaural processing of verbal material.
• Behavioral measures (dichotic listening, speech-in-noise, frequency pattern identification) and functional MRI (fMRI) scans were assessed before and after training.

Main Results:

• Significant improvements were observed in dichotic listening and speech-in-noise tests following ARIA training.
• Post-training fMRI revealed increased activation in the anterior cingulate and medial prefrontal regions during diotic tasks.
• fMRI also showed decreased activation in specific prefrontal and precentral regions during dichotic tasks after ARIA training.

Conclusions:

• ARIA training appears beneficial for children with dichotic listening deficits.
• The training may facilitate reorganization of cortical capacity for listening and reduce reliance on top-down processing skills.