tag:blogger.com,1999:blog-14815894.post4156506172601076145..comments2024-03-28T23:24:55.654-04:00Comments on Bayblab: Meta-analysisKamelhttp://www.blogger.com/profile/15548259062576527751noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-14815894.post-53233229556207688912009-08-04T01:21:07.565-04:002009-08-04T01:21:07.565-04:00Look, studies can be evaluated individually, but y...Look, studies can be evaluated individually, but you run into a little problem called generalizability. If your study is performed under one setting under specific conditions, then your results only stand for that setting under those conditions. Meta-analyses pool findings so that you don't have to go digging around to find specifics. If I'm interested in the relationship between A and B in setting C, for example, how relevant is a study done finding relationships between A and B in setting D? Meta-analyses allow for examinations in a broader context. Don't knock it.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-14815894.post-83199537953819116602007-08-07T00:27:00.000-04:002007-08-07T00:27:00.000-04:00Sounds to me like meta-analysis is a fancy word fo...Sounds to me like meta-analysis is a fancy word for uselessness. Why on earth would it be desirable to summarize findings if the data are "unbiased", that is equally argue for and against the hypothesis - like the data is a bunch of random information? If the data made it through peer-review to be published it has in theory been put through a "reality filter". Shouldn't we expect it to indeed be biased to reflect reality since expert reviewers have judged that the author's experimental approach is sound?<BR/><BR/>Clearly one only one of these sets of data are correct (for or against hypothesis); the other should never have been published in the first place and should not be included in a "meta-analysis", but ignored. So I agree, individual findings need to be treated and evaluated individually.<BR/><BR/>Clearly there is a bias in science toward sexy "positive" results that uphold the establishment's status quo, this is a continual challenge. Hopefully though in most cases it is still only "positive" results that are true getting through peer-review, and not "positive" results that are untrue. Ideally if proper review standards are applied, "publication bias" would simply mean a bias towards reality or truth.<BR/><BR/>It's a nice concept to try to increase statistical power by pooling results of different studies - but in practice how useful is it to throw all the data from experiments performed under different conditions into the same bag? Better to just make individual studies meaningful by using big enough sample sizes in the first place.Baymanhttps://www.blogger.com/profile/03436172198266062229noreply@blogger.com