A note on the use of simultaneous test procedures.

Simultaneous test procedures have been found to be very conservative with respect to Type I errors. The present article emphasizes that simultaneous test procedures are defined for all hypotheses implied by the overall hypothesis and demonstrates that the conservativeness of simultaneous test procedures is most often due to their application to single-variable hypotheses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)