Study record · comparative · 2023

Re-evaluating two popular EEG-based mobile sleep-monitoring devices for home use

Wood E, Westphal JK, and Lerner I

Journal of Sleep Research · 2023

Why this study matters to CircaTest

Independent re-evaluation (not vendor-funded) of the Dreem 3 headband alongside the Zmachine Insight+. Important because most prior Dreem validation work was authored or co-authored by Dreem (the company). Wood et al. give an outside-the-vendor perspective. CircaTest cites this as the independent counterweight to the developer-published Dreem validations.

Abstract

Mobile sleep-monitoring devices for consumer use have been gaining traction as a possible replacement to traditional polysomnography recordings.…

Read the full abstract on the source →

Source: PUBMED · Excerpt for fair-use commentary; full abstract via the source link

Population

Sample size

n = 25

Age

adult

Reference standard

other

25 participants used both the DREEM 3 headband and the Zmachine Insight+ simultaneously for two consecutive nights at home, with a sleep log as a third reference. The study did not use simultaneous PSG; instead it built a Bayesian lower bound on each device's expected epoch-by-epoch agreement using the developers' previously published PSG-validation results.

Devices and metrics

DREEM 3 headband

All studies for this device →

Metric	Value	95% CI	Note
Epoch-by-epoch agreement	see source	—	The published abstract describes the methodology and the Bayesian framework but does not state per-device epoch agreement values that CircaTest can extract without the full paper. Consult the JSR full text for the per-stage and per-device numbers.

Cite this study

Wood E, Westphal JK, and Lerner I (2023). Re-evaluating two popular EEG-based mobile sleep-monitoring devices for home use. Journal of Sleep Research. https://doi.org/10.1111/jsr.13824

AI-assembled record · errors are possible

This page was built and is maintained by AI working from the published abstract and PubMed metadata for the cited study. CircaTest does not have access to the full text of every paper in its corpus. Categories of error that have happened on this site and could happen again include:

Per-device metric values inferred when the abstract reports only an aggregate range
Stage-specific accuracy figures pulled from secondary sources rather than the primary paper
Sample size or population characteristics missing from the abstract
Editorial framing in the curatorial note that overstates the study's actual scope
Year typos and author-name transliteration errors

Where a metric value reads see source, the published abstract did not contain that value and CircaTest deliberately left it null rather than guess. For any decision that depends on the underlying numbers, please consult the linked PubMed, PMC, or DOI source directly. Corrections are welcome via the about page.

Source links

Added to the CircaTest meta-analysis on 2026-04-06. How CircaTest evaluates studies →