By what age should a normally developing infant be able to walk independently without support according to standard developmental milestones?
Answer and explanation
Correct answer: D. 12 to 15 months
- Step 1: Gross motor developmental milestones follow a predictable cephalocaudal progression during early childhood.
- Step 2: Independent walking typically emerges between 12 and 15 months of age, with failure to walk independently by 18 months warranting formal developmental evaluation.
Answer
12 to 15 months.
Why not the others: At 4 to 6 months, infants achieve head control and roll over. At 7 to 9 months, infants sit without support and begin crawling. Achieving independent walking at 24 to 28 months represents significant gross motor developmental delay.
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