Accurately detecting and interpreting nonverbal expressions of pain is important for caregiving. Although not conceptualised as an emotion, pain can also be communicated through facial expressions 19,32,38. The main method used to explore this takes a component approach, measuring movements of facial muscles during pain 12. However, this may be different to how we process facial expressions in naturalistic environments, where challenging visual conditions mean that specific details are difficult to see, e.g., brief exposure, limited visibility 10,34,43,44.
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