Which stage of development typically spans from ages 19 to 40?

The stage of development that typically spans from ages 19 to 40 is young adulthood. During this period, individuals tend to focus on forming intimate relationships, pursuing careers, and establishing personal independence. Young adulthood is characterized by exploration, self-discovery, and the establishment of life goals. People in this stage often seek to build close friendships and romantic partnerships, and they may also start families of their own.

This developmental stage is crucial for personal and professional growth, as it lays the foundation for the subsequent stages of life. The experiences and choices made during young adulthood significantly influence an individual's future development and well-being.

In contrast, adolescence refers to the stage prior to young adulthood, covering a broader age range focused on identity exploration and maturation. Middle adulthood follows young adulthood, typically starting in the early 40s, and is associated with life transitions and reassessing personal achievements. Infancy is the very early stage of life, focusing on rapid growth and basic developmental milestones. Each of these stages has distinct characteristics and significance, with young adulthood specifically focusing on the transition into fully functioning adulthood.