What was the varible for Mozart experiment?

I searched Google under the key words "Mozart experiment variable" to get these possible sources:

http://www.google.com/search?client=safari&rls=en&q=Mozart++experiment+variable&ie=UTF-8&oe=UTF-8

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.