The Relationship Between Wearables and Gold Standard Measures

Proportional bias means that the performance of a wearable changes based on how much it measures. Kathy Goldstein was talking about, um, actigraphy used for nighttime and naps. And I thought that was just kind of a cool way of looking at it. They tend to measure things in the same way across time but they are agnostic to circumstance. It can be an important sign of something.