This document discusses emotional intelligence and its impact on leadership effectiveness. It begins by defining emotional intelligence as involving self-awareness, self-regulation, motivation, empathy, and social skills. Research has shown that leaders who outperform their peers have mastered these aspects of emotional intelligence. The document then examines different models of emotional intelligence, tools for measuring emotional intelligence like the BarOn EQ-i and EQ-360, and research linking higher emotional intelligence to better leadership performance. It concludes that developing emotional intelligence competencies is important for leadership success and that leadership requires long-term development, not just short training courses.