Overview of the mobile sensing protocol in the MINDMAP and HANC studies
| Signal monitored (corresponding device) | Measurement strategy | Validation of data |
|---|---|---|
| GPS (BT-Q1000XT GPS receiver, Qstarz) | One measure every 5 s, worn on the right hip for the recruitment day and 7 additional days | Daily mobility cross-validated by the travel diary and the GPS-based mobility survey |
| Tri-axial accelerometer (GT9X for MINDMAP and wGT3X-BT for HANC, ActiGraph) | Five-second epochs, worn on the right hip for the recruitment day and 7 additional days | Analysis of non-wear time of device |
| Proximity detection among household members in HANC (wGT3X-BT, ActiGraph) | Sixty-second epochs, proximity detection between nearby devices: receiver (main participant) and beacons (other household members), worn on the right hip for the recruitment day and 7 additional days | |
| Sleep patterns (wGT3X-BT, ActiGraph) | Sixty-second epochs, worn on the non-dominant wrist for the recruitment night and 7 additional nights (wrist-worn Actigraph not worn during the day) | Verification of bed and wake times |
| Electrodermal activity (EdaMove 4, movisens) | Thirty-two hertz measurement, worn on the non-dominant wrist with two adhesive electrodes attached on the hand palm during waking times for the recruitment day and 7 additional days | Analysis of nonwear time of device. Cross-validation of the physiological signal with with time-matched information on acute stress from the Eco-Emo Tracker smartphone survey |
| Eco-Emo Tracker smartphone survey (Samsung Galaxy S9, Android 9) | One measure every 5 s from the smartphone GPS; 8 EMA surveys per day for the recruitment day and 7 additional days | Real-time monitoring of response rates by the research assistants in the Eco-Emo Tracker web platform, permitting to intervene in time to provide support |
EMA, ecological momentary assessment; GPS, Global Positioning System.