Growth and Development
Milestones and Developmental Theory
Growth and development questions test your ability to place a child on a predictable trajectory. Learn gross motor, fine motor, language, and social milestones by age band. Infants lift the head by two months, roll by four to six months, sit unsupported by eight months, and walk around twelve months. Pincer grasp appears near nine to twelve months. Two-word phrases emerge around two years, and parallel play gives way to cooperative play in the preschool years. Erikson's stages - trust versus mistrust in infancy, autonomy versus shame in toddlerhood, initiative versus guilt in preschool - frame psychosocial questions. Piaget's sensorimotor, preoperational, concrete operational, and formal operational stages explain how children reason about illness and teaching.
Traps to Watch
Regression during stress or hospitalization is normal and expected; it is not automatically a red flag. Loss of a previously achieved milestone is a red flag. Questions may ask what to teach a child at a given age - use Piaget: a preschooler needs concrete, simple explanations and play, while an adolescent needs privacy and peer-sensitive teaching. Do not accept a milestone as delayed based on one late skill; look for a pattern across domains.
Rule of Thumb
For teaching, match the explanation to the cognitive stage. For assessment, compare the child to their own prior level before comparing to norms. A child who was walking and now is not needs prompt evaluation.
Worked Example
A four-year-old is scheduled for surgery. The best teaching approach is brief, concrete language with a doll or play session, because the preoperational child understands through imitation and play, not abstract reasoning.