However, only one of these is a “genuine” or Duchenne smile. Discovered by French anatomist Duchenne de Boulogne in 1862, the key difference between this “real” happy smile and a “fake ...
That said, we are more positively influenced by a smile when it is genuine, which is known as a Duchenne smile. Related: 10 Big Benefits of Smiling Duchenne smiles are named after 19th century ...