%0 Journal Article %T Le nombre de permutations dans les tests permutationnels; The number of permutations in permutation tests %A Louis Laurencelle %J Tutorials in Quantitative Methods for Psychology %D 2012 %I Universit¨¦ de Montr¨¦al %X In a first part, the concepts and theory of exact randomization tests are reviewed, together with their implementation for each of a number of customary test situations including simple anova designs. Approximate (or incomplete) randomization tests are considered in the second part, as manageable alternatives to exact tests. We propose a model to calculate the relative power of approximate randomization tests and sketch out some guidelines for the user. %K statistical tests %K permutation test %U http://www.tqmp.org/Content/vol08-3/p127/p127.pdf