A growing percentage of the population is starting to learn about the concept of emotional intelligence. This concept was first developed by two American university professors, John Mayer and Peter Salovey (1990), who concluded that people with a high emotional quotient should learn more quickly thanks to their abilities. Another psychologist named Daniel Goleman (1995) extended the theory and also made it known. In his articles and books, he argued that people with a high emotional quotient perform better than those with a low emotional quotient. In this essay it will be argued that high emotional intelligence can positively influence job performance to a relatively large extent. Both the benefits and limitations of a high level of EI in the workplace will be discussed and a conclusion will be drawn at the end of this essay. The definition of emotional intelligence given by Salovey and Mayer (1990) focuses on the ability to understand one's own and others' emotions and also to manage one's emotions positively. On the other hand, Goleman's (1995) definition covers more aspects, including 25 skills and abilities such as reliability, communication, and empathy. The first definition is more scientific and appropriate, while the second is called “corporate definition” because its contents satisfy the interests of large companies. However, the academic achievements of the two professors are not widely known while Goleman's edition is commonly accepted thanks to his best-selling book "Emotional Intelligence" (Goleman 1995). The following essay will rely primarily on Goleman's definition. High emotional intelligence can improve work performance, and its various aspects can contribute to working differently. An aspect of emotion... half of the paper... intelligence: Isses in Paradigm building, The emotionally intelligent workplace: how to select, measure and improve emotional intelligence in individuals, groups and organizations, Jossey-Bass Ch.2Goleman D.(2001) An EI-based theory of performance, The emotionally intelligent workplace: How to select, measure and improve emotional intelligence in individuals, groups and organizations, Jossey-Bass Ch.3Fernandez - Araoz C.(2001) The challenge of hiring senior executives, The emotionally intelligent workplace: how to select, measure and improve emotional intelligence in individuals, groups and organizations, Jossey-Bass Ch.6Arnold J., Silvester J., Patterson F., Robertson I., Cooper C. and Burnes B. (2005) Workplace psychology: understanding human behavior in the workplace 4th edition, Pearson Education Limited Essex