The Impact of Singing on Visual and Multisensory Speech Perception in Children on the Autism Spectrum.

Researchers tested whether singing could help autistic children better understand speech by watching lips and hearing sounds together. They found that both autistic and non-autistic children were better at reading lips when speech was sung rather than spoken. However, singing didn't help children combine what they saw and heard any better. This suggests singing makes lip movements clearer but doesn't improve the brain's ability to merge visual and audio information.

This study examined whether sung speech tokens could improve multisensory speech perception in autistic children compared to spoken tokens. Forty children (20 autistic, 20 non-autistic) aged 7-14 were tested using the McGurk illusion paradigm with both spoken and sung speech stimuli across different sensory modalities. Results showed that sung tokens improved visual-only speech identification accuracy for all participants, but did not enhance audiovisual integration (McGurk illusion perception) in either group. The findings suggest that while sung speech provides more salient visual cues that aid lip-reading, this enhancement does not translate to improved multisensory integration of audiovisual speech information in autistic children.

Singing may be a useful tool for improving visual speech perception skills in therapy settings, but additional research is needed to determine optimal implementation and whether prolonged exposure could enhance multisensory speech integration in autistic children.

Small sample size (n=40), single-session exposure to sung speech, unclear what specific properties of sung speech contributed to improvements, and limited assessment of longer-term effects on multisensory integration abilities.

Autistic children show reduced multisensory integration of audiovisual speech stimuli in response to the McGurk illusion. Previously, it has been shown that adults can integrate sung McGurk tokens. These sung speech tokens offer more salient visual and auditory cues, in comparison to the spoken tokens, which may increase the identification and integration of visual speech cues in autistic children. Forty participants (20 autism, 20 non-autistic peers) aged 7-14 completed the study.

Participants were presented with speech tokens in four modalities: auditory-only, visual-only, congruent audiovisual, and incongruent audiovisual (i.e., McGurk; auditory 'ba' and visual 'ga'). Tokens were also presented in two formats: spoken and sung. Participants indicated what they perceived via a four-button response box (i.e., 'ba', 'ga', 'da', or 'tha'). Accuracies and perception of the McGurk illusion were calculated for each modality and format.

Analysis of visual-only identification indicated a significant main effect of format, whereby participants were more accurate in sung versus spoken trials, but no significant main effect of group or interaction effect. Analysis of the McGurk trials indicated no significant main effect of format or group and no significant interaction effect. Sung speech tokens improved identification of visual speech cues, but did not boost the integration of visual cues with heard speech across groups. Additional work is needed to determine what properties of spoken speech contributed to the observed improvement in visual accuracy and to evaluate whether more prolonged exposure to sung speech may yield effects on multisensory integration.