-------- Original Message -------- Subject: Re: MorphoJ - sequential Bonferroni Date: Fri, 29 Oct 2010 08:28:15 -0400 From: Carmelo Fruciano <[email protected]> To: [email protected]
Dear all. Can somebody please help? I used the permutation test in MorphoJ for pairwise comparisons of Procrustes distances between group means (6 groups, 10 000 iterations). And the differences were (as I've expected) statistically significant. But now I am wondering if I have to correct the p values. Or are they already corrected? If they are not then I would like to perform the sequential Bonferroni. But how? Is there a user-friendly software that would do this for me?
Dear Tina, a recent software for multiple comparisons adjustements is SGoF+ ( http://webs.uvigo.es/acraaj/SGoF.htm ), I personally haven't used this software but it should perform various methods, other than the one by Holm known as "sequential Bonferroni". As a side note, when a couple of years ago I checked some references on the subject of adjustments for multiple comparisons, I noticed that, apart from existing various methods, there are also people who have rejected (especially in the biomedical literature) the idea of adjustments itself. All the best Carmelo -- Carmelo Fruciano Dipartimento di Biologia Animale University of Catania Tel. +39 095 7306023 Cell. +39 349 5822831 e-mail [email protected] ---------------------------------------------------------------- Universita' di Catania - A.P.Se.Ma. Servizio di Posta Elettronica
