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. 2014 Nov 19;5:1219. doi: 10.3389/fpsyg.2014.01219

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Copyright © 2014 Cheetham, Suter and Jancke.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Results of the ABX perceptual discrimination task. The figure depicts mean discrimination sensitivity d′ in the ABX perceptual discrimination task for unambiguous avatar and human and highly ambiguous faces. The profile of d′ shows a marked asymmetry along the continua, meaning that unambiguous avatar (and the ambiguous faces) are perceived as more dissimilar than equally spaced human faces. Contrary to the implicit assumption in the UVH, perceptual discrimination difficulty is greatest for human faces. The error bars indicate 1 SE (N = 49).