I am following an SPSS tutorial for Kruskall-wallis test. In the example give, we are comparing the driving reaction time for 3 groups (each group contain 10 subjects) following a drink. 1st grp was given water, 2nd coffee, 3rd alcohol. Kruskall-wallis was significant. A Mann-whitney test was carried on each pair of grps.
As multiple tests are being carried out, SPSS makes an adjustment to the p-value. The adjustment here is to multiply each Mann-Whitney p-value by the total number of Mann-Whitney tests being carried out (Bonferroni correction). But as I know, bonferroni correction should decrease the p value and its formula is p value/nb of tests. So the adj sig should be smaller than the sig. So the sig and adj sig columns should be reversed. Where am I mistaken?