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. 2014 Aug 19;8:562. doi: 10.3389/fnhum.2014.00562

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Copyright © 2014 Yovel, Wilmer and Duchaine.

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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Heritability of face recognition ability (Wilmer et al., 2010). In this study of twins, the second-born twin’s CFMT score (y axis) is plotted against the first-born twin’s score (x axis) for monozygotic (MZ, n = 164) twins (A) and dizygotic (DZ, n = 125) twins (B). MZ correlation is rMZ(162) = 0.70, and DZ correlation is rDZ(123) = 0.29. The high rMZ indicates high family resemblance for CFMT performance, whereas the rDZ of less than half the rMZ indicates that most or all of this family resemblance can be attributed to family genes rather than family environments.