[seymourhersh]

There is way more research than just this study that links early starts to poorer educational performance.

Your speculations have nothing to do with anything in the study, depend on facts that are not supported by any research, and are contradicted by other studies on this topic.

[cassac]

Can you provide some? None of those studies ever say “go to bed earlier and wake up earlier” they always say “shoulder shrug make things later”.

[seymourhersh]

A good starting point would be the pretty broad research on circadian rhythms if you want to know more.