The people who preferred Mozart music to the stories got a bigger IQ boost from the Mozart than the stories, but the people who preferred the stories to the Mozart music got a bigger IQ boost from listening to the Stephen King stories than the Mozart music.
As pessoas que  preferiam Mozart às histórias tiveram um maior aumento de Q.I. ouvindo Mozart do que as histórias, mas as pessoas que  preferiam as histórias a Mozart tiveram um maior aumento de Q.I. ouvindo as histórias do Stephen King do que ouvindo Mozart.