I'm going to pretend I'm better at this than it came out because I didn't play the videos at first, and plus I wasn't really trying that hard, and anyhow I did better on the last ten than the first ten anyhow, and anyhow I'm very good at this sort of thing, much better than you, certainly, I couldn't possibly have gotten only 12 out of 20 right.
Spot The Fake Smile. You'll see videos of twenty people's smiles. Decide which ones are fake, which genuine. Check you answers at the end. Discuss. [link swiped from avva]