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I immediately searched for the word 'sleep' in this article. > And various surveys have confirmed that people who say they are happy also tend to sleep better

I immediately searched for the word 'sleep' in this article. > And various surveys have confirmed that people who say they are happy also tend to sleep better and express positive emotions verbally more frequently. Couldn't better sleep be the cause for happiness?

PedroBatista 7y ago
I think so, but couldn’t happiness be the cause of better sleep? Worried and anxious people don’t sleep very well.
- DennisP 7y ago
  Maybe both ways are true, making it a feedback loop in either direction.
  - graeme 7y ago
    This is certainly my anecdotal experience. I sleep worse when in poor health/stressed. But sleeping less makes me prone to poor health/stress.