Development of Digital Services for Parkinson's Disease

"Participants will be invited to participate in the following sequential phases. Participants can participate in Phases as selected. Control participants will not be invited to Phase 4.~Phase 1. Lab testing \[2 hours\] Validation study of digital technology measures MachineMD and gaitQ to criterion metric of UPDRS.~Phase 2. home/community testing \[2 weeks daily\] Determine feasibility of daily measuring in the home of gaitQ to determine usability, acceptability, and day to day variability of measurement metrics and to determine concurrent validation of home metric to lab metrics to determine, reliability, concurrent validity of change, minimal detectable change and criterion validation to lab-based measures.~Phase 3. Lab retesting \[2 hours\] see Phase 1~Phase 4. Home/community intervention \[2 weeks\] Determine the potential for effect of the gaitQ vibration intervention from a 2-week exposure in the home."