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[R-meta] Effect Sizes From Pretest-Posttest-Control Group Designs and effect sizes from Pretest-Posttest designs

Wolfgang Viechtbauer 
Dear Yingkai,

I don't think there is a single answer here. Of course one can do this -- whether one should in any particular case depends on the circumstances. And not sure why combining effect sizes from pretest-posttest-control group designs and effect sizes from between-group designs is out of the question. In any case, a canonical reference here is:

Morris, S. B., & DeShon, R. P. (2002). Combining effect size estimates in meta-analysis with repeated measures and independent-groups designs. Psychological Methods, 7(1), 105-125. https://doi.org/10.1037/1082-989x.7.1.105

Best,
Wolfgang

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Yingkai Effect Sizes From Pretest-Posttest-Control Group Designs and effect sizes from Pretest-Posttest designs Dec 13 Wolfgang Viechtbauer Effect Sizes From Pretest-Posttest-Control Group Designs and effect sizes from Pretest-Posttest designs Dec 13 Yingkai Effect Sizes From Pretest-Posttest-Control Group Designs and effect sizes from Pretest-Posttest designs Dec 13 Yingkai Effect Sizes From Pretest-Posttest-Control Group Designs and effect sizes from Pretest-Posttest designs Dec 13