Flawed testing scenario? (Score 1)

Scary that this is coming from a researcher.. They mention that polysomnography is the defacto standard for sleep measurement and then state that the best way to run this experiment is to use all 10 devices at the same time? How about you use each device for 1-2 nights at the same time as the polysomnography and then you can compare the accuracy of each device against an industry standard? As if you are going to strap 10 devices on and around you and have any kind of normal sleep activity..