Which age range is associated with the developmental stage known as infancy?

Infancy is typically defined as the developmental stage from birth up to 18 months. During this period, infants experience rapid physical and cognitive development, including major milestones such as basic motor skills, sensory exploration, and initial social interactions. They rely heavily on their caregivers for survival and emotional support, which sets the foundation for attachment and trust.

The other age ranges refer to different developmental stages. The range of 1 to 3 years is typically associated with toddlerhood, where independence begins to emerge. The range of 3 to 5 years corresponds to early childhood, a time characterized by more complex social interactions and beginning cognitive skills related to language and play. The 6 months to 2 years range overlaps with infancy but extends beyond the traditional boundary, as it includes the latter part of infancy and moves into toddlerhood, making it less definitive for defining the infancy stage. Thus, the age range of 0 to 18 months is the most accurate representation of infancy.