http://www.sciencedaily.com/releases/2011/05/110516162219.htm

ScienceDaily (May 16, 2011) — It seems like everyone wants to be happier and the pursuit of happiness is one of the foundations of American life. But even happiness can have a dark side, according to the authors of a new review article published in Perspectives on Psychological Science, a journal of the Association for Psychological Science. They say that happiness shouldn't be thought of as a universally good thing, and outline four ways in which this is the case. Indeed, not all types and degrees of happiness are equally good, and even pursuing happiness can make people feel worse.

People who want to feel happier can choose from a multitude of books that tell them how to do it. But setting a goal of happiness can backfire, says June Gruber of Yale University, who co- wrote the article with Iris Mauss of the University of Denver and Maya Tamir of the Hebrew University of Jerusalem. It's one of the many downsides of happiness -- people who strive for happiness may end up worse off than when they started.