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. 2016 May;145(5):655–663. doi: 10.1037/xge0000157

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© 2016 the Author(s)

This article has been published under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Copyright for this article is retained by the author(s). Author(s) grant(s) the American Psychological Association the exclusive right to publish the article and identify itself as the original publisher.

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Contour-enhanced funnel plot of four data sets. The light gray area represents studies with p values larger than .10. The dark gray area represents marginally significant p values (i.e., .05 < p < .10). Lines represent Egger’s regression test for funnel plot asymmetry. See the online article for the color version of this figure.