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. 2011 Feb 16;6(2):e16919. doi: 10.1371/journal.pone.0016919

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Watanabe et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(a) Relative fixation duration as a function of area of interest averaged over all facial expressions within different combinations of participant groups. Participants tended to fixate on the eyes and nose longer than on the mouth. (b) Relative fixation duration compared between deaf and hearing participants. The deaf participants looked at the eyes longer than the nose whereas the hearing participants gazed at the nose longer than the eyes. (c) Relative fixation duration compared between female and male participants. The female participants tended to fixate on the eyes longer than did the male participants.