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eyegaze data from the autism and control groups, showing the percentage of fixations made to the eye and mouth regions in the Smiles condition. There was a significant interaction between participant group and facial region (p = 0.016). An analysis of simple effects showed the autism group made fewer fixations than controls to the eye region (p = 0.048). There was a trend towards a difference for the mouth region (p = 0.055, 1-tailed).
