This experiment is designed to test whether you can spot the difference between a fake smile and a real one It has 20 questions and should take you 10 minutes It is based on research by Professor ...

but we also smile when we’re anxious, when we’re not feeling great - it becomes a mask. "The way we denote a fake smile is by something called ‘crows feet’ at the side of the eyes.

But what is it about a smile that makes it feel sincere — or fake? The answer lies in a surprising blend of facial anatomy, neurology and emotional authenticity. Not all smiles are created equal, and ...