For children, emotional facial expressions could reveal whether they had a good night's sleep. Researchers found emotional expressivity following sleep restrictions could also forecast later life social problems.
Looking at a person's facial expression may not be the best way to detect their internal emotional feelings.
The human ability to recognize the facial expressions of dogs is acquired through age and experience and is not an evolutionarily selected trait.
Pregnant women with a history of bipolar disorder have a difficult time recognizing specific emotions in facial expressions, a new study reveals.