Affiliation:
1. University of California San Diego
2. Arizona State University and Max Planck Institute for Empirical Aesthetics
3. Arizona State University
Abstract
Abstract
This study uses point light displays both to investigate the roles of global and local motion analyses in the perception of dynamic facial expressions and to measure the information threshold for reliable recognition of emotions. We videotaped the faces of actors wearing black makeup with white dots while they dynamically produced each of 6 basic Darwin/Ekman emotional expressions. The number of point lights was varied to systematically manipulate amount of information available. For all but one of the expressions, discriminability (d′) increased approximately linearly with number of point lights, with most remaining largely discriminable with as few as only 6 point lights. This finding supports reliance on global motion patterns produced by facial muscles. However, discriminability for the happy expression was notably higher and largely unaffected by number of point lights and thus appears to rely on characteristic local motion, probably the unique upward curvature of the mouth. The findings indicate that recognition of facial expression is not a unitary process and that different expressions may be conveyed by different perceptual information, but in general, basic facial emotional expressions typically remain largely discriminable with as few as 6 dynamic point lights.
Publisher
University of Illinois Press
Subject
Arts and Humanities (miscellaneous),Developmental and Educational Psychology,Experimental and Cognitive Psychology
Reference71 articles.
1. Adolphs, R., Tranel, D., Damasio, H., & Damasio, A. (1994). Impaired recognition of emotion in facial expressions following bilateral damage to the human amygdala. Nature, 372(15), 669–672.
2. Ahlström, V., Blake, R., & Ahlström, U. (1997). Perception of biological motion. Perception, 26, 1539–1548.
3. Bassili, J. N. (1978). Facial motion in the perception of faces and in emotional expression. Journal of Experimental Psychology: Human Perception and Performance, 4, 373–379.
4. Bassili, J. N. (1979). Emotion recognition: The role of facial movement and the relative importance of upper and lower areas of the face. Journal of Personality and Social Psychology, 37, 2049–2058.
5. Beall, P. M., & Herbert, A. M. (2001). A Stroop analog task: Words versus facial expressions. Poster presented at an annual meeting of the Vision Sciences Society, Sarasota, FL.