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RolfAndreassen comments on Study shows placebos can work even if you know it's a placebo - Less Wrong Discussion

8 Post author: ata 24 December 2010 04:09AM

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Comment author: RolfAndreassen 25 December 2010 05:30:56AM 2 points [-]

The effect size is 1.6 sigma; 80 people, 40 in each group, 24 versus 14 improvements. The null hypothesis is by no means ruled out. That's in addition to the double-blinding problems others have noted.