This document discusses hypnosis and hypnotizability. It defines hypnosis and notes that hypnotizability is a measurable trait that peaks in late childhood and declines in adolescence. Highly hypnotizable individuals are more prone to spontaneous trance-like states. Hypnosis involves absorption, dissociation, and suggestibility. Applications of hypnosis include smoking cessation, weight control, and managing medical issues. Theories of hypnosis include social-cognitive views and dissociation theories. Hypnosis can help patients control stress, pain, habits and dissociative symptoms. Effectiveness depends on level of hypnotizability.