This document discusses emotional intelligence, including its definition, history, models, and criticisms. It provides definitions of emotional intelligence as the ability to recognize and manage one's own emotions and the emotions of others. The document traces the history of the concept originating in 1964 and gaining popularity from Daniel Goleman's 1995 book. It describes three main models of emotional intelligence: the ability model focusing on perceiving, using, understanding, and managing emotions; the mixed model introduced by Goleman combining abilities and traits; and the trait model measuring self-perceived abilities. The document also notes criticisms of emotional intelligence regarding whether it is a true intelligence and its validity compared to IQ and personality traits.