It has 20 questions and should take you 10 minutes. Research lab's computer is better at guessing the truth than humans. Period. No exceptions. After the volunteer has taken the Spot the Fake Smile test and you've shown him or her the score, ask again, on a scale of 1 to 10, how confident he or she is about telling the difference between a non-Duchenne smile and a Duchenne smile. In a photo, however, the smile is frozen in time; there’s lots of time to look at it, thus the bigger the chance to spot a fake smile and therefore not capture the true essence of a person. The smug smile is one of the most well-known fake smiles there are.

A fake smile or, as I like to call it, a "say cheese" smile, involves the contraction of just the zygomatic major since we cannot voluntarily contract the orbicularis oculi muscle.

But can there be a social benefit from a fake smile? “Their experiment is designed to test whether you can spot the difference between a fake smile and a real one. You’re all faking it. Can you tell a fake smile from a real one? The smile. Most would agree that smiles are contagious. Have you ever wondered if that smile someone flashed you is sincere? A fake smile actually uses different muscles than a real smile. If you have a few spare minutes, take the 20-question Smile Test to really see if you've got what it takes to spot a true grin. It’s always fake. Joeri said : Don't all actors have a fake smile by default thus making this the "real" movie smile?

I haven't done the test yet, but I think exactly the same. Published: 10:52 EDT, 25 May 2012 | … The differences in muscle contraction in genuine versus fake smiles illustrate the separation between the habit and the non-habit systems in the brain. New research suggests that not all smiles are created equal, that people respond differently to smiles Each question has an accompanying video of a person smiling, so you can really "experience" the gesture and make a decision on whether it's real or fake. 6.

There's a fun little test over at the BBC: Spot the fake smile (via Green Ideas). I got 17 out of 20. By Eddie Wrenn for MailOnline. That is the mark of a fake smile. You might want to check out some research on the BBC Science site.

Case closed. Try to spot the difference between fake smiles and real smiles! The muscle responsible for drawing the corners of the mouth outwards, zygomaticus major, is active in both types, but additional muscles are involved in real smiles. Since a real smile is involuntary and a fake one is deliberate, different portions of the brain control the muscles used for each. Showing bottom teeth (fake smile) Showing the bottom teeth on purpose is a strange sight, and it’s a move used by those who are trying to deceive. A smile which shows a large area of the bottom teeth is being displayed because the smiler is trying too hard to look enthused. This “real vs. fake smile” scam is a false dichotomy to distract people from finding out they’re not the only one who thinks smiling is … There’s no such thing as a real smile. Always. In real life, there are way too many distractions that can help a fake smile pass as genuine—distractions such as sound, conversation, and so on.