One of the measurements that can be used to determine a child's developmental progression is to compare the child to the typical developmental milestones. Some examples of developmental milestones are when an infant first sits up, crawls, and walks. There are also developmental milestones for communication, emotional, and social development. The Centers for Disease Control (CDC) provides some extensive information on developmental milestones for infants and young children. (Hint: Type "CDC: Developmental Milestones" into your preferred search engine.)
Why is understanding a child's developmental milestones so important, especially communication, social, and emotional development?