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 ...

Forbes contributors publish independent expert analyses and insights. I write about relationships, personality, and everyday psychology. Personality tests are often treated as tools for diagnosis or ...

A new study by a research team at Université de Montréal highlights a critical lack of knowledge about the cognitive profiles of people living with both schizophrenia and a personality disorder. A ...

One of the enduring puzzles of borderline personality disorder (BPD) is its relentless contradiction. Patients desperately long for closeness yet recoil from it, fear abandonment while provoking it, ...

Mental health disorders come in many forms and affect thoughts, emotions and behaviors in complex ways. Conditions like anxiety, depression and bipolar disorder are among the most frequently diagnosed ...

The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) categorizes histrionic personality disorder (HPD) and narcissistic personality disorder (NPD) into the same cluster of ...

Borderline personality disorder (BPD) may cause challenges in establishing and maintaining stable relationships. People with BPD may cycle between extremes of idealizing and devaluing others. Research ...

Perfectionism, at bottom, is a means of coping with a fragile ego. Founded on black-and-white thinking, or the belief that things are either good or bad to be precise, one comes to believe that either ...