I got 14 out of 20. I judged three fakers as genuine and three genuines as fakers. Ironically, I am unusually adept at reading people. This wasn’t really reading people though, as I had no idea what stimulus brought about the smiles.
Wow, I thought I was so much better at reading faces than I am. I only got 13 out of twenty, though my theory (see Diosa Bellissimma’s post) was correct.
And some of those people are just weird.
17 of 20 here. I thought I’d do better, actually…but oh well.
17 out of 20, better than I expected.
The only ones I got wrong were fakers I thought were genuine.
11/20
I did worse than I expected, but I also kept second guessing myself. I would’ve done better if I hadn’t.
I tried to go through them as fast as I could w/o giving myself a chance to over-analyze.
The only one I got wrong was #14. Total fluke.
I got 18 out of 20 correct. Whoo-who!
19/20 here. #13 threw me, what with her HUGE, BULGING FOREHEAD and all.
(MY GOD! The FOREHEAD!)
I got 18 of 20 as well. The two I missed were right in a row – while I was being distracted. I guess it wouldn’t have killed me to replay the video. Meh…
15/20 for me, I was watching the eyes most of the time, and second-guessed myself a few times - usually making me wrong.
#1, 3, 14, 17, and 20 were the ones I screwed up. 3 of them were false ones I thought were genuine.
As a still photographer, who happened to take seven portraits today, I thought that I was supposed to look at the still photos, mark it real or fake, and then watch the video.
Messed the whole thing up.
This is my exact reply, except the “m’dears” part. I’m more of a “dudes” kinda guy.
Man! I only got 11!
I only got 14 out of 20 correct. I also looked at the eyes. They normally tell the story.
12/20. I did absolutely terribly, although I agree with everyone else who said that it was very disconcerting to see the smiles vanish so suddenly at the end of the clip.
16/20. A couple were a bit hard to read as their eye shapes somewhat obscured things – like the second guy (after the girl and the bald black dude). The corners of his eyes crinkled when he smiled, but on closer examination the eyes seem to lack that smile quality. (I kinda breezed through them) Some were very easy to spot as genuine – they made me smile. 
16 out of 20, better than I thought I did!
I think they filmed the smile and then just played it backwards to make the smile vanish? It did seem to fade so oddly.
I got every one right except 3, 16 and 17. 3s creepy face threw me. I thought his smile was fake but felt it was too obvious so I chose genuine…like someone else said, I should have just gone with my first instincts on all of them.
But man oh man, where’d they find this group? Numbers 6, 12, and 19 are the most…um…human looking of the bunch. The rest look like aliens who didn’t adjust their human masks properly. Wow. Creepy. And did they have to play up the British bad teeth stereotype so much? Bad Teeeeeth!!! {{shudder}}
14/20… This test bugged me though,I’d like to know in what context they are smiling, what makes it genuine as opposed to fake? Were people told to fake smile? What caused the real smiles? Also, what degree of acting was involved? If a subject was told to fake smile, it has a lot to do with the fake smilers skill and how hard he was trying to be convincing, some people are good actors some aren’t. Some people are fakes by nature, so a lot of their real smiles are actually fake, and some people are just smiley people in nature, so even their fake smiles are actually real.
Some people in the test were obviously smiling before the “smile”, some were obviously not smiling, and as someone mentioned before, lots made their smiles cease abruptly, but some did not, those actions influenced my gut feeling a lot
13/20.