Monitoring Substance Use with Fitbit Biosignals: A Case Study on Training Deep Learning Models Using Ecological Momentary Assessments and Passive Sensing.

Summary: Imagine if your smartwatch could tell when someone is using drugs and help them right away. Drug problems affect many Americans, but everyone's body is different, making it hard for computers to track them accurately. Scientists tested a new idea using Fitbit watches and smart computer programs that learn a person's unique habits. They tested this on 9 people who recorded their activities on their phones. The new, personalized smart program worked better at spotting drug use than older programs. While this was a very small test, it shows that smartwatches could one day be a powerful tool to help people struggling with addiction.