I recently communicated with Marc Lajeunesse about how to overcome the 'common control' problem in the calculation of effect sizes. He has prepared code in R for more common effect sizes (available upon request), but it is not likely to appear in upcoming versions of OpenMEE.
Also, see this commentary by Curtis and & Queeborough about other common problems in meta-analysis, which contains a nicely worked example of the 'common control' solution proposed by M. Lajeunesse.
0 Comments
|