Study: Smiling Too Widely Makes You Less Visually Appealing

When it comes to smiling in a convincing manner, less is more. University of Minnesota researchers showed 800 participants a series of 3D computer-animated smiles, and asked them to rate them. The smiles differed in features such as amount, mouth angle, symmetry, and how many teeth were shown. Bigger smiles that showed more teeth tended to be rated as less effective, genuine or pleasant. Successful smiles were those with a pleasing balance of teeth, mouth angle, amount of smile, and were symmetrical on either side of the face, the investigators found. Researchers say the findings could help guide facial reanimation surgery and rehabilitation for people with stroke and other medical conditions that affect facial expressions. (UPI