At approx. 20-25 years of age, the brain forms new neurons, synapses, and dendritic connections, and the cortical regions that handle higher-level thinking become fully myelinated
Traditionally, adulthood was defined by markers such as moving out of the family home, marriage, children, full-time employment, or establishment of career
Emerging adults with the highest well-being were those who were not yet married, had no children, attend college, and lived away from their childhood home