http://norvig.com/experiment-design.html an article by google's research director. Pls read references of this article as well.
http://www.flashcardmachine.com/methods-of-research.html
http://www.socialresearchmethods.net/kb/quasiexp.php
http://linguistics.byu.edu/faculty/henrichsenl/ResearchMethods/
and not to forget
http://drotspss.blogspot.com/2011/02/tajuk-50-cara-mudah-penentuan-analisis.html
