This document discusses Suzanne Cook-Greuter and her work on ego development psychology. It outlines the stages of ego development from theorists like Loevinger and Cook-Greuter, including Impulsive, Diplomat, Expert, Achiever, Individualist, Strategist, and Unitive stages. It also discusses the WUSCT test used to measure ego development and provides examples of responses. Finally, it reflects on the current state of developmental theory, addressing postmodern criticisms and the role of developmental theory in fields like education and leadership.