In 1956, a group of educators led by Benjamin Bloom identified three overlapping human learning domains: cognitive learning, psychomotor learning, and affective learning. They represent the knowledge, skills, and beliefs, respectively, of a human performer. The integrated framework of these three domains has since become known as Bloom's Taxonomy. Even though the three domains are tightly integrated aspects of human learning, traditionally only the skills and knowledge domains have been part of the corporate training focus. Training professionals have shied away from the affective domain because of its complexity.