Accuracy is highly important to us. We have conducted a number of studies on the precision of our SoftWave™ sensors, comparing them to other sleep tracking technologies. You can review the preliminary results of a larger study, which is very nearly at the end of data collection. Here are the links to the abstracts:

• “Evaluation of a Portable Monitor for Staging Sleep” (PDF)
• “Performance of a Wireless Dry Sensor System in Automatically Monitoring Sleep and Wakefulness” (PDF)

You can also take a look at the results of another study, conducted and reported by prominent sleep scientist Dr. David White. His study showed excellent concordance with Zeo in phasing sleep. You can find it here:

• Blake SK, Pittman SD, MacDonald MM, et al. Assessment of a wireless dry sensor to detect sleep in healthy volunteers and subjects with sleep disorders. Sleep. 2009;32 (Suppl.):A370

These reports were presented at the annual meetings of Associated Professional Sleep Societies in 2008 and 2009. More studies are in progress.