Apologies for the lazy comment (I know I could do the research, but I'm busy atm). I 100% agree this is an affect of caffeine, but I'm also interested in what

Apologies for the lazy comment (I know I could do the research, but I'm busy atm). I 100% agree this is an affect of caffeine, but I'm also interested in what research on the following shows: 1. How does caffeine compare to other factors (stress, exercise, diet) in affecting sleep? 2. Does caffeine have a placebo affect on sleep quality? I ask these questions, as I've found that caffeine does affect my sleep quality, but at the same time stress levels are probably a better predictor of how well I sleep.