The **Transition Theory** was developed by **Levinson** as part of his **Seasons of a Man's Life** theory, primarily based on his research on adult development. The theory outlines how individuals pass through a series of stages during adulthood, with each stage marked by transitions that are either anticipated or unanticipated. These transitions can be significant milestones in a person’s life, such as career changes, relationships, or family life, and how these transitions influence their sense of self and overall development.
However, when discussing "transition theory" in a broader sense (outside of Levinson’s context), the term might also refer to **Theory of Transitions in Education** or **Transition Management Theory**.
To clarify the specific theory, it’s important to determine the exact context in which "transition theory" is being discussed. Let me know if you’re asking about one of those or any particular focus!