IQ score context
Average IQ by age: what actually changes?
IQ scores are standardized, but the skills behind performance can shift with attention, speed, sleep, practice, and life stage.
Quick answer
A single number is not the whole profile
IQ tests are usually standardized against age-relevant norms. That means the score and the underlying skills are related, but not identical.
What can change
1
Processing speed can shift over time.
2
Knowledge and strategy often grow with experience.
3
Sleep and attention can change test-day performance.
4
Practice effects can improve familiarity with task types.
What to look at besides age
Reasoning consistency
Memory under load
Focus across tasks
Progress over repeated sessions
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