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Dear all, I would like to know whether it is possible to make a meta-analysis of meta-analysis when several meta-analyses have been done on the same topic if you can gather the number of studies, average effect...

Dear all, I would like to know how to take the baseline difference into account in meta-analysis of the impact of a treatment on experimental data in which the baseline of the control group is different from the baseline...

Dear all, I have a question about taking the reversed values when combining different proxies of one factor. For instance, if you're doing a meta-analysis on the impact of X on Y where Y is mental health and...

Thanks a lot for those helpful responses! Best, Gladys Le mer. 2 f?vr. 2022 ? 14:54, James Pustejovsky <jepusto at gmail.com> a ?crit : > I wonder about exactly this question for most of the second-order > meta-analyses that...

Dear all, I am conducting a meta-analysis on the causes and consequences of human-nature connectedness. As most of the studies were correlational, I collected zero order Pearson r correlations between HNC and let's say 3 moderators (Exposure...

Dear all, I am doing a meta-analysis on experimental data on the impact on several behavioral interventions including both *pre-post studies* (measurement of a trait before and after the intervention) *and control vs. treatment studies *(measurement after a...

Dear all, I would like to know whether it is possible to conduct a meta-analysis on the mean values of a variable (for which I have sample size, standard deviation, mean age, gender distribution, country etc.). Can such an...

Dear all, I am contacting you to have your advice about a reviewer comment on a meta-analysis. The reviewer said that as we used multiple comparisons from within studies (e.g., five effect sizes from one particular paper comparisons...

Dear Mike, Thanks a lot for your reply. Yes, I just want to see whether my data are more consistent with a causal vs. bidirectional model. Is metaSEM appropriate to do this? Best, Gladys Le lun. 18 janv. 2021 ? 10...

Dear Wolfgang, Thanks a lot for your helpful response which reinforces my belief that this was the right thing to do. All the best, Gladys Le jeu. 30 sept. 2021 ? 08:38, Viechtbauer, Wolfgang (SP) < wolfgang.viechtbauer at maastrichtuniversity.nl...

Okay, so you can't obtain an overall effect size while controlling for design? Le lun. 3 mai 2021 ? 14:36, Michael Dewey <lists at dewey.myzen.co.uk> a ?crit : > If you include a moderator you do not get...

Dear Michael, thanks a lot for your reply. I have a structure like this: Article ID. Study ID. Effect size. X et al. S1 0.5 X et al. S2 0.8 Y et al. S1 0.2 Y et...

Hi Gerta and Michael, I am not sure to understand. I am not saying the the effect size are different. They are comparable but of course differ in term of ci since the number of studies, participants are different. I...

Dear Wolfgang, Thanks for your helpful reply. Actually I am not (randomly) assuming the causality. For instance, most of the correlational studies I included in the meta-analysis (from which I extracted Pearson correlations) also performed a SEM showing that...

Thanks a lot! That was exactly what I needed. Best, Gladys Le mer. 17 mars 2021 ? 13:27, Viechtbauer, Wolfgang (SP) < wolfgang.viechtbauer at maastrichtuniversity.nl> a ?crit : > Dear Gladys, > > Whether this makes sense depends on how thse variables are...

Dear Wolfgang, Following Simon's question, I am also comparing the efficiency of programs (pre-post comparisons). For some of them, I do have several effect sizes for one study and one lab. So I was using the following code...

Dear Gerta, Thanks for your response. I also realized that most of the time papers do not report the pre-treatment and/or the pre-control values. Sometimes they just say that the values are not different but do not...

Dear Wolfgang, After reading your post carefully, I am still a bit confused about how to implement the random effects. My data are coded as follows (similar number or text in one lab means same lab and similar number or...

Thanks a lot Wolfgang. That is very helpful. Best, Gladys Le mar. 19 janv. 2021 ? 09:31, Viechtbauer, Wolfgang (SP) < wolfgang.viechtbauer at maastrichtuniversity.nl> a ?crit : > Dear Gladys, > > Yes, you can flip the sign. In essence, this is what...

Yes, it does make sense. Thanks a lot Gerta. Best, Gladys Le mar. 4 mai 2021 ? 11:25, Gerta Ruecker <ruecker at imbi.uni-freiburg.de> a ?crit : > Hi Gladys, > > Note that separate meta-analyses is not the same as...