Interesting article: The use of predicted confidence intervals when planning experiments and the misuse of power when interpreting results. Goodman S Annals of Internal Medicine 1994; 121(3): 200-206. [Medline] [Abstract] [Full text] Description: An early article written for doctors that explains why you should not calculate power after the experiment is completed. These calculations have, according to the authors, an "Alice-in-Wonderland feel" because they are guaranteed to confuse the issue. The description of this article was written by Steve Simon on 2007-11-27, edited by Steve Simon, and was last modified on 2008-01-12. Send feedback to ssimon at cmh dot edu or click on the email link at the top of the page. Category: Interesting articles, Category: Post hoc power