• Judith Kappesser and Amanda C de C Williams.
• Department of Psychology, University of Bath, Claverton Down, Bath BA2 7AY, UK.
• Pain. 2002 Sep 1;99(1-2):197-206.

AbstractFacial expression of pain has rarely been researched in the context of facial expression of negative emotions with which it may occur. The main aim of the study was to investigate how pain expression resembled or differed from that of other negative emotions (fear, anger, sadness, surprise, disgust and embarrassment), using multidimensional scaling, a dimensional approach to understanding relationships among emotions. As possible misidentification of facial expressions by participants could distort those results, a judgement study as a categorical approach was conducted to examine the accuracy of identification of pain and negative emotion facial expressions. The sample was health care professionals. Identification of pain was good (unbiased hit rate 58.8%), but less than all other negative emotions. Confidence in ratings approximated accuracy of identification. Multidimensional scaling revealed two dimensions: the first distinguished embarrassment from all other emotion expressions; the second separated pain, sadness and anger from fear, surprise and disgust. Possible explanations for these findings were sought in patterns of facial action units, and in the messages conveyed by the expressions according to Fridlund's Behavioural Ecology View.Copyright 2002 International Association for the Study of Pain

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