3. Simple Regression

As I write this chapter, a program at the University of Virginia, called the Reproducibility Project, is getting considerable publicity for its work. That work consists of replicating published experiments to determine whether the findings stand up when the studies are repeated. The project expends considerable effort to ensure that the conditions that were in place when the experiment was originally conducted are maintained when it’s replicated. Even so, the findings in around 60% of the experiments are substantially weaker when repeated ...

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