create new tag
, view all tags, tagging instructions
Return to Online Journal Club Discussion

(PLEASE NOTE: On the bottom of this page, you will find the topic for discussion and the name of the contributor.)

The role of statistical power

Email Notification of Changes: Click here and add TITLE of the topic to the body of the email.

Please add comments and then click on the "Add comment" button.


OnlineJournalDiscussionForm edit

Title_Discussion_Topic The role of statistical power
Name_Topic_Initiator Peter Bacchetti
Online_Journal_Club_Meeting Meeting 3
Description - Problem to be explored In this article, Gigerenzer appears to me to provide an example of an odd phenomenon: many people seem to be big fans of power calculations despite explicitly rejecting the automatic decision making and dichotomization of a study’s results that the usual “hypothesis testing” framework requires. When Gigerenzer writes (page 602), “there were finally 9 researchers who computed the power of their tests,” it sounds almost like he is endorsing post-hoc power calculations. Power is irrelevant for interpreting completed studies, whether calculated before the study or (more accurately) after. In addition, the definition of power requires dichotomizing the results of a study as P<alpha or not. This is a severe mismatch with how many of these same people advocate that a study’s results should be reported and interpreted (see, e.g., here ). I’ve argued that reporting power calculations only serves to promote poor interpretation of studies’ results, along the very lines that Gigerenzer (and others) criticize.
See Also

Disclaimer The views expressed within CTSpedia are those of the author and must not be taken to represent policy or guidance on the behalf of any organization or institution with which the author is affiliated.
Topic revision: r2 - 02 Dec 2013 - 11:06:15 - MaryBanach

Copyright &© by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding CTSPedia? Send feedback