 Coined by psychology professor Jeffrey Arnett, emerging adulthood has been known variously as "transition age youth", "delayed adulthood", "extended adolescence", "youthhood", "adultolescence", and "the twixter years".Of the various terms, "emerging adulthood" has become popular among sociologists, psychologists, and government agencies as a way to describe this period of life in between adolescence and young adulthood.Compared to other terms that have been used which give the impression that this stage is just a "last hurrah" of adolescence, "emerging adulthood" recognizes the uniqueness of this period of life.