alleryWhat does research show about formal operations?
AEveryone reaches them by age 12
BMany adults never use them fully
CThey appear before conservation
DThey need no experience at all
Answer & Solution
Correct answer: B. Many adults never use them fully
1. Piaget placed formal operations from about age 11 onwards.
2. This stage is mainly about the scientific kind of reasoning: forming and testing hypotheses.
3. Many people rarely meet such problems in daily life.
4. Research finds many people never achieve or use formal thinking fully or consistently.
5. Others use it only in areas they know very well.
6. This is a key critical point: the last stage is not universal.
**Why the other options fail:**
- Everyone reaching them by 12 overstates Piaget.
- Conservation is a concrete operational skill that comes earlier.
- Cross-cultural work shows experience and schooling matter.
_Source: Seifert and Sutton, Educational Psychology, 2nd ed. (2009, CC BY 3.0), Ch 3, section "The formal operational stage: age 11 and beyond", p. 50_
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