Emotional Intelligence
The earliest roots of emotional intelligence can be traced to Charles Darwin's work on the importance of emotional expression for survival and adaptation.[2] In the 1900s, even though traditional definitions of intelligence emphasized cognitive aspects such as memory and problem-solving, several influential researchers in the intelligence field of study had begun to recognize the importance of the non-cognitive aspects. For instance, as early as 1920, E.L. Thorndike used the term social intelligence to describe the skill of understanding and managing other people.[3] Similarly, in 1940 David Wechsler described the influence of non-intellective factors on intelligent behavior, and further argued that our models of intelligence would not be complete until we could adequately describe these factors.[2] In 1983, Howard Gardner's Frames of Mind: The Theory of Multiple Intelligences[4] introduced the idea of multiple intelligences which included both interpersonal intelligence (the capacity to understand the intentions, motivations and desires of other people) and intrapersonal intelligence (the capacity to understand oneself, to appreciate one's feelings, fears and motivations). In Gardner's view, traditional types of intelligence, such as IQ, fail to fully explain cognitive ability.[5] Thus, even though the names given to the concept varied, there was a common belief that traditional definitions of intelligence were lacking in ability to fully explain performance outcomes. The first use of the term "emotional intelligence" is usually attributed to Wayne Payne's doctoral thesis, A Study of Emotion: Developing Emotional Intelligence from 1985.[6] However, prior to this, the term "emotional intelligence" had appeared in Leuner (1966).[7] Stanley Greenspan (1989) also put forward an EI model, followed by Salovey and Mayer (1990),[8] and Daniel Goleman (1995). The distinction between trait emotional intelligence and ability emotional intelligence was introduced in