I am comparing a number of architectural characteristics in two sets of muscles using Mann-Whitney U test (sample size is too small to justify the use of parametric tests). I want to do a post-hoc adjustment of the alpha (e.g. Bonferroni, Dunn-Sidak), but SPSS (v. 21) does not show any post-hoc option for M-W test. I know how to manually do the post-hoc tests, but still want to see how the spss presents the results. If somebody could suggest a solution to this problem, it would be highly appreciated. Thank you.