Study: optimistic people sleep better at night

Being a “glass half full” kind of person may help you sleep better at night.
Researchers from the University of Illinois studied the sleeping habits of more than 35 hundred people.
They were also asked to fill out a survey in order to measure their level of optimism.
Those who were more optimistic were more likely to get between six and nine hours of sleep a night.
They were also less sleepy during the day and had fewer symptoms of insomnia than those with a negative attitude.
The s