Audiovisual Speech Perception in Children with Autism Spectrum Disorders: Evidence from Visual Phonemic Restoration

Area of Science:

• Neuroscience
• Developmental Psychology
• Speech Perception

Background:

• Children with autism spectrum disorder (ASD) may be less influenced by visual speech cues compared to typically developing children.
• Understanding audiovisual speech processing is crucial for diagnosing and supporting children with ASD.

Purpose of the Study:

• To investigate neural signatures of audiovisual speech processing in children with and without ASD.
• To examine the influence of visual speech on auditory perception using a novel paradigm in children with ASD.

Main Methods:

• Employed a visual phonemic restoration paradigm using event-related potentials (ERPs).
• Presented typically developing children and children with ASD with audiovisual stimuli: video of /ba/ paired with auditory /ba/ or weakened /ba/ (sounding like /a/).
• Assessed discrimination responses between /ba/ and /a/ under visual /ba/ influence.

Main Results:

• Typically developing children exhibited visual phonemic restoration, perceiving the weakened auditory /a/ as /ba/ when a visual /ba/ was present.
• Children with ASD showed a significant discrimination response between /ba/ and /a/ even with a visual /ba/, indicating less reliance on visual speech cues.
• This suggests reduced audiovisual integration for speech perception in children with ASD.

Conclusions:

• Children with ASD demonstrate a reduced influence of visual speech during auditory perception.
• Findings highlight differences in audiovisual speech processing and integration in children with ASD.
• This research contributes to understanding sensory processing variations in autism spectrum disorder.