Background: Reduction or differences in facial expression are a core diagnostic feature of autism spectrum disorder (ASD), yet evidence regarding the extent of this discrepancy is limited and inconsistent. Use of automated facial expression detection technology enables accurate and efficient tracking of facial expressions that has potential to identify individual response differences. Methods: Children and adults with ASD (N = 124) and typically developing (TD, N = 41) were shown short clips of "funny videos." Using automated facial analysis software, we investigated differences between ASD and TD groups and within the ASD group in evidence of facial action unit (AU) activation related to the expression of positive facial expression, in particular, a smile. Results: Individuals with ASD on average showed less evidence of facial AUs (AU12, AU6) relating to positive facial expression, compared to the TD group (p
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Bangerter, A., Chatterjee, M., Manfredonia, J., Manyakov, N. V., Ness, S., Boice, M. A., … Pandina, G. (2020). Automated recognition of spontaneous facial expression in individuals with autism spectrum disorder: Parsing response variability. Molecular Autism, 11(1). https://doi.org/10.1186/s13229-020-00327-4
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