David Kolb developed an experiential learning theory that describes how experience allows for learning. His theory proposes a four stage cycle of learning: concrete experience, reflective observation, abstract conceptualization, and active experimentation. Kolb also developed a learning style inventory that categorizes learners as having a preference for diverging, assimilating, converging, or accommodating based on how they approach tasks and process information. Kolb's experiential learning theory provides a framework for understanding adult learning and development through hands-on experiences.