Hello, I'm a novice in R. So i don't understand why in the package multtest, i found "possible results" with mt.teststat (for example : -1.227144e+00), but i i've found : 1.000000e+00, for resT or maxT. i think it's very strange,no???? Thanks for your help sandrine -------------------------------------------------------------------------------- Université de Bretagne sud http://www.univ-ubs.fr/