Debating Emerging Adulthood : Oxford University Press : 9780199757176 : 0199757178 : 03 Feb 2011 : The transition from adolescence to adulthood has undergone significant changes in recent decades. Unlike a half century ago, when young people in industrialized countries moved from adolescence into young adulthood in relatively short order at around age 20, now the decade from the late teens to the late twenties is seen as an extended time of self-focused exploration and education in pursuit of optimally fulfilling relationships and careers. Recognition of this new period is stronger than ever, but an important question remains: should emerging adulthood be considered a developmental stage, or a process? In Debating Emerging Adulthood: Stage or Process? two pairs of developmental psychologists take sides in a debate that is central to the very concept of emerging adulthood. Arnett and Tanner argue that as young people around the world share demographic similarities, such as longer educa