Re: [R] Metafor: Differences between two categories of a moderator

2011-06-02 Thread Viechtbauer Wolfgang (STAT)
roject.org [r-help-boun...@r-project.org] On Behalf Of Holger Steinmetz [holger.steinm...@web.de] Sent: Wednesday, June 01, 2011 10:10 AM To: r-help@r-project.org Subject: Re: [R] Metafor: Differences between two categories of a moderator Hi Wolfgang that's good news. One further small fol

Re: [R] Metafor: Differences between two categories of a moderator

2011-06-01 Thread Holger Steinmetz
Hi Wolfgang that's good news. One further small follow-up question: When I conduct multiple comparisons via the relevel-command: should I adjust the p-value? Thanks in advance, Holger -- View this message in context: http://r.789695.n4.nabble.com/Metafor-Differences-between-two-categories-of-a-

Re: [R] Metafor: Differences between two categories of a moderator

2011-05-31 Thread Viechtbauer Wolfgang (STAT)
m: r-help-boun...@r-project.org [r-help-boun...@r-project.org] On Behalf Of Holger Steinmetz [holger.steinm...@web.de] Sent: Tuesday, May 31, 2011 12:52 PM To: r-help@r-project.org Subject: [R] Metafor: Differences between two categories of a moderator Hi there, when using the metafor packag

[R] Metafor: Differences between two categories of a moderator

2011-05-31 Thread Holger Steinmetz
Hi there, when using the metafor package for testing mixed effects models with categorical moderators, I get a regression table reporting betas. These betas are mean differences between a certain category in the effect size to the reference category (intercept). In addition, the QM-tests allows te