[bflesch]

The study is clearly about correlation and not causation, but still the term "important predictor" keeps triggering me. People can't sleep due to stress or noise or disease (e.g. coughing), and while "predictor" seems to be normal science lingo I feel it nudges the conclusion of this study into the direction of causation instead of very clearly saying that it is pure correlation.

Nobody goes to bed and wants to wake up 2 hours later.

[Schiendelman]

But they choose to. Alcohol, caffeine in the afternoon, just not realizing blackout curtains matter, lights or displays on in the room... you can't help someone who isn't making bad choices, but most people can make simple choices that improve their sleep a lot!