Which of the following stages is NOT part of human development in the life course?

Middle Age is considered a stage of human development in the life course, but it is often not categorized in the same way as the earlier stages, such as Infancy, Childhood, and Adolescence. These earlier stages are typically characterized by significant physical, emotional, and cognitive changes that are well-documented and defined in developmental psychology.

Infancy, Childhood, and Adolescence mark distinct periods where individuals undergo critical growth and development—both physically and mentally. During Infancy, for example, foundational motor skills and social attachments are formed. In Childhood, further cognitive abilities develop, including language and social skills. Adolescence is known for the maturation of identity and the transition from childhood to adulthood, accompanied by hormonal changes and increased independence.

While Middle Age does encompass important milestones, it is often viewed less critically in terms of development compared to these early life stages, as it tends to focus on stability rather than growth. Thus, in the context of human development stages, Middle Age might not be categorized in the same way as the formative stages of life.