Summary

Nicholas Coles, Ph.D., had long heard that forcing a smile can make you feel a little happier—after all, he had done a lot of the research that supposedly proved it. But something didn't sit quite right with his own findings. "I used to work in customer service. I actually got written up for my inability to keep smiling at work at an unnamed theme park in Florida," laughed Coles, a professor of psychology at the University of Florida.

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