Douglas_Knight comments on Open thread, Sep. 28 - Oct. 4, 2015 - Less Wrong Discussion
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Keep in mind that modafinil has a half-life of ~16 hours. You might want to allow a day in between samples. If you don't, plan to take this into account in the analysis.
Whatever test you do, try it a bunch before starting the experiment to get through a lot of the learning period.
Thanks for the suggestions!
My plan was to include a 1-day lag of the independent variable as a control variable in some of the regressions and see what effect that had.
Yep, plan to do that, and then also add a 'date' control variable as well.