Levinson sees the twenties as a "novice" phase of adult development.
Development goes up against new significance in adulthood in light of the fact that the procedure is never again characterized by physical and intellectual development spurts. Adulthood, which includes the lion's share of a man's life expectancy, is set apart rather by extensive psychosocial picks up that are combined with relentless yet moderate physical decay. Maybe the best‐known arrange hypothesis of grown-up advancement is that offered by Daniel Levinson . As indicated by Levinson, the ages of 17 to 45 include early adulthood, which he partitions into the novice phase (17– 33) and the culminating stage (33– 45).