The study of human personality or "character" (from the Greek charaktêr, the mark impressed upon a coin) dates back at least to antiquity. In his Characters, Tyrtamus (371-287 B.C.) — nicknamed ...

Narcissistic personality disorder (NPD) is 1 of 10 clinically recognized personality disorders. Though NPD is only one official diagnosis, doctors further classify the condition into 2 types.

Wondering what really causes borderline PD? New neuroscience discoveries suggest that genetics and brain irregularities may ...

HAMBURG — What is “normal” and what isn’t? This question is constantly being renegotiated in psychology. And sometimes, the boundaries shift, as they are now. What is considered a personality disorder ...

The exact cause of personality disorders is unclear. However, genetics, neurological differences, and environmental factors may contribute to the development of these complex mental health conditions.