might be difficult to get a good night's sleep the night before a big
interview, but we all know it helps.
Now, new research shows that on top of helping people perform better,
getting more sleep also makes individuals appear more intelligent to
teachers and prospective employers.
A group of psychologists at the University of St Andrews, Scotland
looked at 190 faces, belonging to children and adults.
They measured how open the eyelids were and how curved the mouths were
using face-processing software.
A panel of more than 200 people were then asked to rate the
attractiveness and intelligence of these faces.
The results showed that faces with a subtle frown and dropy eyes were
perceived as less intelligent.
Photographs were also taken of the same participants after a full
night's sleep and after a night of restricted sleep.
When the same individuals had less 'eyelid-openness' and a subtle
frown it resulted in a significant decrease in their perceived