4 ms·

> there's a sleep tracking EEG gadget Which one would that be?

by DenisM 12y ago

gwern 12y ago
The late lamented Zeo, possibly.
- DenisM 12y ago
  I doubt Zeo was doing any actual EEG. It certainly didn't show it to the user. As to their "smart logic" - my friend fooled it into proclaiming deep sleep by merely sitting still.
  - gwern 12y ago
    > I doubt Zeo was doing any actual EEG. It certainly didn't show it to the user. Why do you say that? If it wasn't doing EEG, uh, what was it doing? And why was the published research comparing it to polysomnograph setups with EEGs? > As to their "smart logic" - my friend fooled it into proclaiming deep sleep by merely sitting still. And yet, it's always worked brilliantly for me.
    - DenisM 12y ago
      My guess is that Zeo mostly measured motion - motion correlates well with sleep, which explains why it seems "to work" for you and others, and despite that it can still be fooled by sitting still. I haven't read the studies, so I don't know about them - maybe they just found correlation? I do know that my friend's experiment has pretty much completely deflated my interest in Zeo. Though he is not your friend, so you're free to disregard it. :) The other thing to consider is price - pretty much all of the real EEG gadgets even today come above $300, and have more than one electrode. It's "too good to be true" type of situation. What electric signal Zeo did use likely wasn't EEG, maybe some sort of skin sensor.
      - gwern 12y ago
        > My guess is that Zeo mostly measured motion - motion correlates well with sleep, which explains why it seems "to work" for you and others, and despite that it can still be fooled by sitting still. I tried the same thing but nothing doing. And measuring motion wouldn't get sleep phase. > The other thing to consider is price - pretty much all of the real EEG gadgets even today come above $300, and have more than one electrode. It's "too good to be true" type of situation. What electric signal Zeo did use likely wasn't EEG, maybe some sort of skin sensor. The Zeo did cost $300+ originally!

> there's a sleep tracking EEG gadget Which one would that be?

by DenisM 12y ago

> there's a sleep tracking EEG gadget Which one would that be?

gwern 12y ago

The late lamented Zeo, possibly.

DenisM 12y ago
I doubt Zeo was doing any actual EEG. It certainly didn't show it to the user. As to their "smart logic" - my friend fooled it into proclaiming deep sleep by merely sitting still.
- gwern 12y ago
  > I doubt Zeo was doing any actual EEG. It certainly didn't show it to the user. Why do you say that? If it wasn't doing EEG, uh, what was it doing? And why was the published research comparing it to polysomnograph setups with EEGs? > As to their "smart logic" - my friend fooled it into proclaiming deep sleep by merely sitting still. And yet, it's always worked brilliantly for me.
  - DenisM 12y ago
    My guess is that Zeo mostly measured motion - motion correlates well with sleep, which explains why it seems "to work" for you and others, and despite that it can still be fooled by sitting still. I haven't read the studies, so I don't know about them - maybe they just found correlation? I do know that my friend's experiment has pretty much completely deflated my interest in Zeo. Though he is not your friend, so you're free to disregard it. :) The other thing to consider is price - pretty much all of the real EEG gadgets even today come above $300, and have more than one electrode. It's "too good to be true" type of situation. What electric signal Zeo did use likely wasn't EEG, maybe some sort of skin sensor.
    - gwern 12y ago
      > My guess is that Zeo mostly measured motion - motion correlates well with sleep, which explains why it seems "to work" for you and others, and despite that it can still be fooled by sitting still. I tried the same thing but nothing doing. And measuring motion wouldn't get sleep phase. > The other thing to consider is price - pretty much all of the real EEG gadgets even today come above $300, and have more than one electrode. It's "too good to be true" type of situation. What electric signal Zeo did use likely wasn't EEG, maybe some sort of skin sensor. The Zeo did cost $300+ originally!