Perhaps you’ve heard that you can brighten your mood just by faking a smile. But that idea, which came out of a psychological experiment from the 1980s, may not be true after all, as scientists were not able to repeat the results in a lab setting in a large, rigorous new study.
The hypothesis, called the facial-feedback hypothesis, dates back to a 1988 study in which participants rated the humor of cartoons while inadvertently mimicking either a smile or a pout. The participants were simply asked to hold a pen in their mouths, either with their lips (which pushes the face into a frown-like expression) or their teeth (which mimics a smile). The participants who used the pen to mimic a smile rated the cartoons as funnier.
Read the whole story: Live Science