xkcd
2
Blind Trials
Plus, you have to control for the fact that some people are into being
blindfolded.
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![[[A human stands on a stage, pointing at a projected display.]] Human: We've designed a double-blind trial to test the effect of sexual activity on cardiovascular health. Human: Both groups will think they're having lots of sex, but one group will actually be getting sugar pills. The limitations of blind trials](https://imgs.xkcd.com/comics/blind_trials.png "Plus, you have to control for the fact that some people are into being blindfolded.")