Significance levels for multiple testing adjusted p-values May I ask what is the conventional significance levels for multiple testing adjusted p-values (no matter Bonferroni or Holm or Sidak)? For unadjusted p-values, many researchers use * 5%, ** 1% and *** 0.1%. Are those levels applied to the adjusted p-values? Is there any common agreement on this? Thank you in advance!

The conventional cut-offs for adjusted p-values are the same as for unadjusted p-values.  That is, if someone were inclined to use alpha = 0.05 as the threshold for "significance" on a single hypothesis test, they would be inclined to use alpha = 0.05 for a family of hypothesis tests with adjusted p-values.
