The paper demonstrated the hypothesis through a complicated experiment in which college students were asked to make a judgment about something they could not know for certain -- guessing someone's weight in a photo -- before having their moods swayed either positively, negatively or neutrally by snippets from films intended to provoke either anger, euphoria or no strong feelings.

CNN: When emotion takes over

In essence, I believe this was not a failure of the drug or the mechanism but a failure of us as investigators to make sure we had sufficient disease in our population upon which to test our hypothesis--somewhat akin to trying to show one antibiotic is better than another or even a placebo, but selecting a population with no infection!

FORBES: Experts Speak On Vytorin Study

Convincing empirical evidence for the peace-interest hypothesis is a tall order as controlling for all the other factors which make for war or peace is difficult.

ECONOMIST: Going global

If the privileged window hypothesis is correct, feelings are reliable precisely because they are tuning us into the cumulative knowledge necessary to make good decisions.

FORBES: Study: Why Trusting Your Feelings Makes You a Better Future Predictor