Emotional intelligence (EI) or emotional quotient (EQ) is the capability of individuals to recognize their own, and other people's emotions, to discriminate between different feelings and label them appropriately, and to use emotional information to guide thinking and behavior. The term gained popularity in the 1995 book by that title, written by the author, psychologist, and science journalist Daniel Goleman, but his model has been criticized within the scientific community. There are several models of EI. Goleman's own model may now be considered a mixed model that combines what have subsequently been modelled separately as ability EI andtrait EI. Goleman defined EI as the array of skills and characteristics that drive leadership performance. The trait model was developed by Konstantin Vasily Petrides in 2001. It "encompasses behavioral dispositions and self perceived abilities and is measured through self report." The ability model, developed by Peter Salovey and John Mayer in 2004, focuses on the individual's ability to process emotional information and use it to navigate the social environment. Studies have shown that people with high EI have greater mental health, exemplary job performance, and more potent leadership skills although no causal relationship has been shown. For example, Goleman indicated that EI accounted for 67% of the abilities deemed necessary for superior performance in leaders, and mattered twice as much as technical expertise or IQ. Other research finds that the effect of EI on leadership and managerial performance is non-significant when ability and personality are controlled for, and that general intelligence correlates very closely with leadership. Markers of EI and methods of developing it have become more widely coveted in the past few decades. In addition, studies have begun to provide evidence to help characterize the neural mechanisms of emotional intelligence. Criticisms have centered on whether EI is a real intelligence and whether it has incremental validity over IQ and the Big Five personality traits. This book discusses the history, types and theories on the values and different types of emotional intelligence and is designed to be a state of the art, superb academic reference work and provide an overview of the topic and give the reader a structured knowledge to familiarize yourself with the topic at the most affordable price possible. The accuracy and knowledge is of an international viewpoint as the edited articles represent the inputs of many knowledgeable individuals and some of the most current knowledge on the topic, based on the date of publication.