The 38-year-old pop star was referring to the lyric 'Be too sweet, and you'll be a goner (Yep) / I'll pull a Jeffrey Dahmer' ...

Perfectionism is typically the drive to become perfect. Yet in narcissism, it’s the maintenance, at all costs, of the belief ...

Your brain and skin are interconnected—and when a disorder affects both, treatment must involve a multidisciplinary approach.

What makes someone “cool” appears to be remarkably consistent across cultures, according to a global psychology study.

Personality refers to individual differences in characteristic patterns of thinking, feeling and behaving. It can also refer to how the patterns in different domains combine in each individual.