4 ms·

Hypothesis: people who smile in yearbook photos are not really happy, just concerned with appearances, and thus likely to stay in a joyless marriage for appeara

• cduan 18y ago
  Though they did measure wrinkles around the eyes as well, which is generally a sign of a genuine smile. http://en.wikipedia.org/wiki/Smile#Duchenne_smile http://en.wikipedia.org/wiki/Smile#Duchenne_smile (Yes, you can fake that as well, but I doubt enough people know about that part to do it.)
• amichail 18y ago
  Smiling in yearbook photos is probably an indication of conformity.
• antidaily 18y ago
  My wife didn't smile in hers because she had just recently chipped a tooth and had to have her braces put back in. Not sure what that proves.
  • yummyfajitas 18y ago
    It proves that they didn't discover a rule, but merely a trend.