Zeo is not the only consumer EEG either, though all the current headbands (including what we are building at https://affectablesleep.com) have some sort of sleep stimulation at it's core.
Frenzband I believe is shipping, I haven't tried one, and don't know anyone who has. We have a Somnee at the office, and it is unbearably painful to wear. I'm highly skeptical of the "science" of either of these devices as well.
Still, I'd bet that whatever accuracy wearables get only work on a population, not individuals. I'm not surprised they are decent (though they can barely detect when you are sleeping...) but I don't put any faith at all on an individual basis.
Given the data they can collect that is the best anyone can hope for anyway.
So if you want to diagnose your own sleep, which you presumably would want to do if you are suspecting an issue, I wouldn't trust them one bit.
Citation needed.
As someone else noted, the paper you linked to is from 2015. Apple Watch couldn't do it until watchOS 9 (2022, 7 years later), but can now do this pretty reliably.
You might find the "Algorithm Development and Validation" section of this whitepaper interesting: https://www.apple.com/healthcare/docs/site/Estimating_Sleep_...
Definitely not 100% accurate but as someone who checks their sleep log (and time in each stage using the Pillow app) daily, it seems pretty accurate and I can correlate how I feel on a given day back to that day’s sleep report with pretty good correlation.
Definitely not perfect but better than nothing.
If you’ve ever been on medication that suppresses REM sleep, Apple Watch detects REM rebound very clearly.
It's also showing various sleep stages whens he knows she's been awake, trying to sleep.
To be fair, people actually aren't that great at detecting when they (or others) are really sleeping. Especially for one's self, it's common to believe that you spent more of the night tossing and turning than you really did, when in reality you actually got some light sleep sprinkled in those periods.
That said, consumer-grade wearable devices are demonstrably not great at this either.
The Garmin may be right considering the quality of TV... even if she had her eyes open...
But it never showed any naps as actual sleeping time. Until I saw your comment I thought that the garmin would only log sleep overnight and never during the day. Did you have to enable something for it to log naps?
The Basis Peak did a good job at tracking sleep but they got bought up and killed off by Intel for god knows what reason. The Peak also did automatic activity detection and it was quite good at it.
Basis also had hands-down the best visualization of activity and sleep trends, and was the only watch at the time to do full time HRM.
They claimed the Peak watches were a fire risk and recalled them, probably to have a reason to get rid of all the back end infrastructure.
Garmin still can't reliably autodetect biking and its sleep tracking is pretty terrible, too.
He very throughly compares countless models with a Polar H10 strap. Some come close enough.