Neuroscientists have shown that blind people recognize basic faces using the same brain regions as sighted ... different-shaped houses, geometric shapes, and basic, emoji-style happy and sad faces.

Putting on “a happy face” brightens a person’s mood because moving facial muscles can influence emotions, according to a new study. Stanford University researchers found that people who ...

Even the top 10 display an amazing array of emotions, much more diverse than just happy and sad. Many songs often exhibit multiple emotions, and two of the 10 seem to combine positive and negative.

You may be extremely happy or very sad, but others can’t tell because your face, gestures, and body language don’t reflect those feelings. Because of this, you may seem uncaring and unresponsive.

In one, titled “Give Me a Happy Face,” Sitterud instructs participants to shift between emotions on command: “Now, give me a happy face. Now, give me a sad face.” The result is awkward ...