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“Control for as many variables as possible” is bad advice. Some variables must be controlled, others must never be. This guide uses causal diagrams to separate
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A teacher tries a new method with one class and scores rise by 15 percentage points, so the method works. There are at least five other explanations. Here is ho
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Many proposals pick “quantitative” first and write the question afterwards. Reverse it: read the verb in your research question and let it decide the design, th
