alleryHow many strata does the Cattell-Horn-Carroll theory have?
ATwo
BFour
CSeven
DThree
Answer & Solution
Correct answer: D. Three
1. Recall the fact: CHC has narrow abilities, broad abilities and a single general ability.
2. The option "Three" matches it.
3. Why the others fail: Two, four or seven do not match the three strata.
4. Check the stem wording against the fact: only one option satisfies both.
_Source: Wikipedia, "Cattell–Horn–Carroll theory" (CC BY-SA, rev 1370239797), section "Lead section"_
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