Multisensory Integration of Naturalistic Speech and Gestures in Autistic Adults.

This study looked at how autistic and non-autistic adults use both sight and sound to understand speech in noisy social situations. Brain scans showed that autistic and non-autistic people's brains process this information differently. However, both groups got the same benefit from being able to see the speaker's face and gestures while listening, helping them understand speech better in challenging environments.

This EEG study investigated how autistic and neurotypical adults integrate visual and auditory speech information in realistic social environments. Participants completed speech-in-noise tasks under different sensory conditions while brain activity was recorded. Results showed that neurotypical adults demonstrated non-linear audio-visual processing in alpha brain oscillations, while autistic adults showed additive processing patterns. Despite these neural differences, both groups achieved similar behavioral benefits from combining visual and auditory speech cues.

The findings suggest that while autistic and neurotypical brains process multisensory information differently, they can achieve comparable functional outcomes in speech comprehension when visual cues are available.

Results suggest that visual speech cues (seeing the speaker's face and gestures) may be equally beneficial for autistic individuals in challenging listening environments. This supports using visual supports and face-to-face communication strategies, though different neural processing patterns indicate the need for individualized approaches.

Sample size not reported, limiting assessment of statistical power. Study type unclear. Single study design without replication. Limited to speech processing in controlled laboratory conditions, which may not fully represent real-world multisensory challenges.

Seeing the speaker often facilitates auditory speech comprehension through audio-visual integration. This audio-visual facilitation is stronger under challenging listening conditions, such as in real-life social environments. Autism has been associated with atypicalities in integrating audio-visual information, potentially underlying social difficulties in this population. The present study investigated multisensory integration (MSI) of audio-visual speech information among autistic and neurotypical adults.

Participants performed a speech-in-noise task in a realistic multispeaker social scenario with audio-visual, auditory, or visual trials while their brain activity was recorded using EEG. The neurotypical group demonstrated a non-linear audio-visual effect in alpha oscillations, whereas the autistic group showed merely additive processing. Despite these differences in neural correlates, both groups achieved similar behavioral audio-visual facilitation outcomes. These findings suggest that although autistic and neurotypical brains might process multisensory cues differently, they achieve comparable benefits from audio-visual speech.

These results contribute to the growing body of literature on MSI atypicalities in autism.