James C. Coyne is an influential psychologist who isn't afraid to criticise other psychological researchers if they don't maintain high standards. This probably isn't his best piece, in my opinion. Most of it is on triple P parenting program but one has to read quite a bit to get to his main point(s). Anyway, here's a piece near the start that I thought was interesting enough: There is a Cochrane review of GET being undertaken at the moment by GET researchers. I think it is useful to know the sorts of criticisms that can be made of meta-analyses.