Summarize research findings on physical and motor development in infancy and early childhood. Explain what developmental norms are and why they are important.

Motor Development

The progressive acquisition of skills involving movement, such as grasping, walking, and coordinated physical activity, typically seen in infants and children as they grow.

Developmental Norms

Standardized milestones that describe the typical sequence and timing of developmental progress in various domains.

Infancy

A developmental period in humans that spans from birth to 18-24 months, characterized by rapid physical, cognitive, and emotional growth.