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Assessing heterogeneity in meta-analysis: Q statistic or I² index?

PSYCHOLOGICAL METHODS, no. 2 (2006): 193-206

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In meta-analysis, the usual way of assessing whether a set of single studies is homogeneous is by means of the Q test. However, the Q test only informs meta-analysts about the presence versus the absence of heterogeneity, but it does not report on the extent of such heterogeneity. Recently, the 12 index has been proposed to quantify the d...更多

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