Temre N. Davies a1andDonald D. Hoffman a1 a1 Department of Cognitive Sciences, University of California, Irvine, Irvine, CA 92697
What differentiates expressions of pain from other facial expressions? Which facial features convey the most information in an expression of pain? To answer such questions we can explore the expertise of human observers using psychophysical experiments. Techniques such as change detection and visual search can advance our understanding of facial expressions of pain and of evolved mechanisms for detecting these expressions.