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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Child Youth Serv Rev. 2015 Mar 10;52:74–88. doi: 10.1016/j.childyouth.2015.03.005

Table 2.

Summary of effect size characteristics.

Number of effects 104
Median r .21
Mean weighted r .22
Test comparing r to 0 Z = 10.214, p < .001
95% confidence interval around mean weighted r (.18, .26)
Range of r (−.66, .77)
Heterogeneity Qw = 3797.70, p < .001