alleryA developmental delay is judged against the:
Aaverage age alone
Btypical age range
Csibling's age
Dclass average
Answer & Solution
Correct answer: B. typical age range
1. There is considerable variation in when children reach milestones.
2. Delays are judged by comparison with the age variability of a milestone, not with the average age of achievement.
3. So the yardstick is the typical age range.
_Source: Wikipedia, "Child development" (rev 1378784615), section "Milestones"_
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