alleryThe g factor summarises what among different cognitive tasks?
ANegative correlations
BRandom test errors
CGroup differences
DPositive correlations
Answer & Solution
Correct answer: D. Positive correlations
1. Recall the fact: The g factor is a construct summarising positive correlations across tasks.
2. The option "Positive correlations" matches it.
3. Why the others fail: Correlations are positive, not negative or random.
4. Check the stem wording against the fact: only one option satisfies both.
_Source: Wikipedia, "G factor (psychometrics)" (CC BY-SA, rev 1373421829), section "Lead section"_
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