This experiment is based on research by Professor Paul Ekman, a psychologist at the University of California. It’s designed to test whether you can spot the difference between a fake smile and a real one and should take you about 10 minutes to complete.
Visit http://www.bbc.co.uk/science/humanbody/mind/surveys/smiles/index.shtml and get cracking! While you’re at it, try a few of the other psychological tests…they’re super fun.
