To quantify atypical facial expression patterns in children with autism spectrum disorder (ASD) during spontaneous interactions.
Key Findings:
ASD group showed increased prominence of anger and altered emotion transition probabilities, indicating distinct emotional processing.
Heightened activation in non-core facial muscles was observed, suggesting atypical emotional expression.
Atypical facial coordination was noted in the ASD group, which may impact social interactions.
ASD classification achieved 92.4% accuracy and 0.977 AUC, demonstrating the robustness of the method.
Regression analyses predicted symptom severity with mean absolute errors of 13.94 on the ABC scale and 3.84 on the CABS scale, indicating potential for clinical application.
Interpretation:
The study reveals subtle facial dynamics in children with ASD that traditional methods fail to capture, providing a quantitative basis for understanding atypical expressions and their implications for diagnosis.
Limitations:
Video and clinical information cannot be publicly shared due to privacy concerns, which may limit reproducibility.
The study's findings may not generalize beyond the specific sample used, necessitating further research.
Conclusion:
The findings suggest potential for using quantitative markers in large-scale ASD screening in naturalistic settings, which could enhance early diagnosis and intervention.
