Sophie Sowden, postdoctoral researcher in the School of Psychology discusses how speed at which we produce facial expressions plays an important role in our ability to recognise emotions in others.

A team carried out research which showed that people tend to produce happy expressions more rapidly, while sad expressions are produced more slowly and angry expressions fall somewhere in between.

https://www.birmingham.ac.uk/schools/psychology/research/themes/language-interaction-cognition.aspx