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<p>Hedges, L. V., &amp; Pigott, T. D. (2001). The power of statistical tests in meta-analysis.
<em>Psychological Methods</em>, 6(3), 203–217. <a href="https://doi.org/10.1037/1082-989X.6.3.203" class="external-link">doi:10.1037/1082-989X.6.3.203</a></p>
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