I once met a man who believed he had another person, a soul, living inside of him. It brought him comfort—a psychological construct. I didn’t take it literally, but I took it seriously. I once ...

Lizzie Duszynski-Goodman is a journalist living in the Midwest with her husband and two young children. Her work explores the intersection of mental health, wellness and parenting. She is the former ...

Comorbidity is when a person has more than one health condition at once. Researchers investigating the comorbidity of personality disorders have found people with certain disorders may have other ...

A visual representation of split personality disorder. When people hear the word "split personality", they often tend to link it with the movies and the vision of a person flipping between the two ...

Cameron West’s eyes go somewhere else for a moment. He’s sitting beside his wife of 45 years, Rikki, in the middle of a conversation about a morning more than 30 years ago. She opened a closet door in ...

The Enneagram is a tool that defines nine personality types. Many individuals use it in various theoretical settings. The Enneagram of Personality Types is a modern tool that is based on various ...

In ancient Greece, the physician Hippocrates is said to have theorized that the ratio of four bodily fluids—blood, yellow bile, black bile, and phlegm—dictated a person’s distinct temperament. The ...

A simple personality test based on choosing one of three mirrors—vintage, handheld, or full-length—reveals hidden traits.