Match each clinical presentation of developmental milestones to the expected chronological age at which a typical child demonstrates these specific skills.
- Uses a mature pincer grasp, points to objects of interest, stands independently, and says 1 to 2 words other than 'mama' and 'dada'.12 months
- Kicks a ball forward, builds a tower of six cubes, uses two-word phrases, and engages in parallel play alongside peers.24 months
- Rides a tricycle, copies a circle, knows their own age and gender, and has speech that is approximately 75% intelligible to strangers.36 months
- Hops on one foot, copies a cross, names at least four colors, and engages in cooperative play with other children.48 months
Answer
The clinical presentations correctly match sequential ages: the 12-month-old stands and points, the 24-month-old uses two-word phrases, the 36-month-old rides a tricycle, and the 48-month-old hops and copies a cross.
Developmental milestones follow a well-defined chronological trajectory across gross motor, fine motor, language, and social domains. At 12 months, children achieve upright mobility and early targeted communication. At 24 months, vocabulary expands to combinations, and motor skills allow for play manipulation. At 36 months, coordination improves to allow pedaling, and speech is mostly understood by strangers. By 48 months, complex balance and cooperative social integration are established.
Step-by-Step Solution
Key Concept
Normal Pediatric Growth and Developmental Milestones