Dr. Kim claims that a new method teaches reading faster. After a term, pupils taught by the new method read more words per minute than pupils taught by the standard method.
Which one of the following, if true, most strengthens Dr. Kim's claim?
Answer and explanation
Correct answer: C. The pupils were assigned at random and had similar scores beforehand
- Step 1: Random assignment and equal starting scores rule out other explanations. Step 2. That strengthens the claim. Answer: random assignment and similar starting scores. Why not the others: these do not help or could even weaken the claim.
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