I’ll add: medical journals *do not study* behavioral changes very often or in enough granularity to be useful, even when common sense and experience says they matter. Ergonomics is a big example. You won’t find published studies saying “bad chairs hurt your back”, but they do.https://twitter.com/bryan_caplan/status/1240638168409370624 …
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Optimizing your physical environment is the kind of thing RCTs are inherently bad at testing. There are infinitely many possible types of chairs; an RCT can only compare maybe two or three.
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RCT’s are for *testing* an intervention that you’ve ideally *already designed* to work as well as possible, through a more informal iterative process.
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So even if an RCT says that some behavioral intervention doesn’t work, when the intervention is some very broad class (“exercise”, “therapy”) that doesn’t actually say that nothing in that class works.
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End of conversation
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