Information and IdeasVery hardInference from a natural experiment
Information and Ideas practice question
Two neighbouring schools adopted the same new maths textbook in the same year. Test scores rose at one and fell at the other. The school where scores rose gave its teachers a term to plan lessons around the book before it was introduced; the other school introduced it in the first week of term. The most reasonable interpretation is that ____
Which choice most logically completes the text?
- A. the textbook's effect depended on how well teachers were prepared to use it.Correct
- B. the textbook is a poor one.
- C. the textbook is an excellent one.
- D. test scores are unrelated to teaching.
Answer: A. the textbook's effect depended on how well teachers were prepared to use it.
Same book, same year, different preparation, opposite results.
Why the other answers are wrong
- B. the textbook is a poor one.
- Scores rose at one school.
- C. the textbook is an excellent one.
- Scores fell at the other.
- D. test scores are unrelated to teaching.
- The preparation difference tracked the scores.
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