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. 2010 Dec 22;5(12):e14406. doi: 10.1371/journal.pone.0014406

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Pietschnig 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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Note. Symbol size is varied according to study weight. (A) Mean IQ of 960 independent samples for the MWT in assumed year of study performance 1971–2007. (B) Mean IQ of 164 samples for the WST in assumed year of study performance 1995–2006.