This outcome is statistically significant (p = 0.016), but the data show a weird pattern: caffeine’s effectiveness went up over time instead of staying flat. I don’t know how to explain that, which makes me suspicious of the experiment’s findings.
Something something you adapt to a ~constant effect of the substance, thus learning to leverage it better?
Well, ok this doesn’t explain why his reaction time without caffeine also improved (and even more so than with caffeine) but perhaps this could be explained by something like: caffeine increases the efficiency of some circuits, reaction time tests/exercises sculpt those circuits and sculpt them even more when on caffeine and some of that sculpting persists even when not on caffeine. (speculating ofc)
Something something you adapt to a ~constant effect of the substance, thus learning to leverage it better?
Well, ok this doesn’t explain why his reaction time without caffeine also improved (and even more so than with caffeine) but perhaps this could be explained by something like: caffeine increases the efficiency of some circuits, reaction time tests/exercises sculpt those circuits and sculpt them even more when on caffeine and some of that sculpting persists even when not on caffeine. (speculating ofc)