alleryThe Flynn effect is about how many IQ points per decade?
AAbout 1
BAbout 8
CAbout 3
DAbout 15
Answer & Solution
Correct answer: C. About 3
1. Recall the fact: One estimate is about 2.93 points per decade, roughly 3.
2. The option "About 3" matches it.
3. Why the others fail: The other values are far from the estimate.
4. Check the stem wording against the fact: only one option satisfies both.
_Source: Wikipedia, "Flynn effect" (CC BY-SA, rev 1375564293), section "Rise in IQ during the 20th century"_
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