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2012 Jun 06
3
Sobel's test for mediation and lme4/nlme
...<- sqrt(effvar) zvalue = indir/serr out <- list(Model.1 = mod1.out, Model.2 = mod2.out, Model.3 = mod3.out, Indirect.Effect = indir, SE = serr, z.value = zvalue, N = nrow(NEWDAT),n.grps=length(unique(NEWDAT$grpid))) return(out) } Any help much appreciated! Best, Gavril -- Gavril Bilev, PhD Department of Political Science Brown University Providence, RI 02906 [[alternative HTML version deleted]]