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> Actually, they didn't touch the lights at all, they only measured the lights that people already were exposed to. But isn't it a flaw of the study? It only s
by noname120 9y ago
> Actually, they didn't touch the lights at all, they only measured the lights that people already were exposed to.
But isn't it a flaw of the study? It only shows correlation without causality. What if being exposed to light is correlated to some other factor that is responsible for increased depression? In this case, decreasing the amount of light won't decrease depression.
- dpark 9y agoIt’s a limitation, not a flaw. Ethical concerns limit a lot of studies. It’s not generally considered ethical to induce depression in human subjects. But yes, it’s possible that some other factor is responsible, such as living next to a busy road with lots of street lights.
- noname120 9y agoSorry for the confusion, I forgot to specify that I was giving an answer to the following: > they only measured the lights that people already were exposed to