Have you ever met anyone like Seinfeld’s George Costanza, vacillating between submissiveness and obstinance? Perhaps an employee who’s a “yes man” when asked to do a project, only to become ...

Emily Laurence is a journalist, freelance writer and certified health coach living in Raleigh, North Carolina. She specializes in writing about mental health, healthy aging and overall wellness. For ...

Conduct disorder involves a pattern of antisocial, defiant, aggressive behavior in childhood and teenage years. If it continues into adulthood, a person may have antisocial personality disorder (ASPD) ...

What exactly does it mean to say that someone is “passive-aggressive”? I hear this term used frequently, usually with reference to a coworker, child, parent, etc, who is being a pain in the ass.

Forbes contributors publish independent expert analyses and insights. Dr. Lance B. Eliot is a world-renowned AI scientist and consultant. In today’s column, I am continuing my ongoing series about the ...

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.