Does any one have an example of a Controlled Experiment or website an example would be on?

Please Help!!!!Does any one have an example of a Controlled Experiment or website an example would be on?
here ya go








http://192.107.108.56/portfolios/l/lautz鈥?/a>





http://www.otal.umd.edu/hci-rm/cntlexp.h鈥?/a>