Cargo Cult Science by Richard Feynman (.PDF)

Searchable versions:

http://www.google.com/search?q=%22all+experiments+in+psychol...

http://www.lhup.edu/~DSIMANEK/cargocul.htm

http://www.farnhamsfreehold.org/blog/?p=171

http://blogs.myspace.com/index.cfm?fuseaction=blog.view&...

http://lanseybrothers.blogspot.com/2009/08/cargo-cult-scienc...

Related, here is probably the most important essay Jerry Pournelle ever wrote, http://www.jerrypournelle.com/science/voodoo.html .

Always a fun read- but I'd be interested in hearing if the situation is better in Psychology now, and/or if other fields have this problem today.