Marcia Kraft Goin, MD

Splitting, archetypally imbedded in a patient's psychic structure, acts as a powerful unconscious force to protect against the ego's perception of dangerous anxiety and intense affects. Rather than providing real protection, splitting leads to destructive behavior and turmoil in patients' lives.

A popular slang definition of the verb to split is "to depart," or "to leave." In this context, to split describes the occasional wish of a psychiatrist who may be mired in the chaos created by the behavior of a patient diagnosed with borderline personality disorder. The primary definition of to split is "to divide sharply or cleanly."