Philip Gehrman, PhD

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228 appearances 1 recordings 1 series first heard Jul 2026 last heard 8 Jul

Philip Gehrman, PhD’s voice in public audio — every appearance, attributed to the second.

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Recordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.

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Well, people with insomnia lie awake in bed still, but still awake.

And these devices tend to overestimate that as sleep.

And that's that's seen.

So they the worse you sleep, probably the less accurate these devices are.

Are.

And it what drives me crazy is when my clients come in and they say exactly what you say.

You know, I thought I slept well last night, but my wearable said I didn't.

So therefore I did not.

And they treat it as absolute truth.

And so I always tell people to take them with a grain of salt.

And there's certainly there have been some published studies of uh what a colleague has has termed orthosomnia.

where people are developing insomnia because of wearing these devices.

They're developing this obsessive focus on their sleep, and it's actually making their sleep worse.

So when people come into the sleep lab, or I should say we're doing this a lot in people's homes these days.

Uh my current studies are almost all happening in people's homes now, where we're monitoring their brain activities, so their EEG.

One of the things that's important, a di important differentiator is all the wearable devices, they're not actually measuring sleep.

They're measuring movement, heart rate, uh, skin temperature.

Or kind of depending on what sensors they contain.

And they're using that information to estimate sleep and wakefulness.

The only way you can actually measure sleep directly is by measuring brain activity.

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