About 12% of Americans experience chronic insomnia, defined as trouble falling asleep, staying asleep or returning to sleep after waking up in the night.

Instead, wanting their group to feel superior to other groups was a much more significant motivation to believe in conspiracy theories. In terms of personality traits, the researchers found a ...

Students become more conscientious, open and competitive when they spend time with peers or friends who also exhibit these ...

A study conducted at the Faculty of Medicine of the University of São Paulo (USP) in Brazil examined the influence of ...

But the psychological theory of birth order didn’t develop ... s “family constellation” results in predictable personality traits. “The position in the family leaves an indelible stamp ...

In the past, researchers proposed more than 4,000 possible personality traits. More recent theories categorize traits into smaller, broad domains. Where a person falls on the scale of each broader ...

The psychological theory of personality known as the Dark ... the probability of a candidate’s risk on specific toxic personality traits, which can be further scrutinized during interviews ...

Birth order theory suggests that first- and last-born ... As a result, they may develop similar personality traits and a strong bond with each other. Gender may also affect birth order personality.