Thank you for helping us collect high resolution data for the INTERACT study. The SenseDoc device includes a Global Positioning System (GPS) receiver, a tri-axial accelerometer, and a long-lasting battery. Please wear the SenseDoc all day for 10 consecutive days starting first thing in the morning.
DO I WEAR IT WHEN I'M SLEEPING?
No, please take it off at night and make sure to plug the device into the wall outlet and let it charge overnight.
WHERE SHOULD I WEAR IT?
Please wear it on your right hip at all times. This position will provide the best accelerometry readings to measure your levels of activity.
DO I HAVE TO WEAR IT WITH THE ELASTIC BELT?
We strongly encourage you to wear it looped through a belt – either yours or the elastic one provided. While the SenseDoc does have a clip, it can more easily pop off and become damaged if it’s not looped through a belt. Moreover, the accelerometer works best at recording your movements when worn snug against your hip.
CAN I GET IT WET?
No! The device contains sensitive electronic components and is not weatherproof. Please treat it like you would a cell phone.
I'M WORRIED ABOUT DAMAGING IT IF I'M DOING INTENSE SPORTS OUTSIDE. CAN I PUT IT IN MY PACK?
Yes, please put it in a back pack if you think you might risk damaging it by keeping it on your hip. We would encourage you to wear it on your hip as much as possible to collect the best data.
I'M FEELING A BIT SICK TODAY AND WON'T BE DOING TOO MUCH. CAN I RESUME MY DATA COLLECTION IN A COUPLE OF DAYS WHEN I'M BACK TO MY REGULAR ROUTINE?
Getting ill is a fact of life. We prefer that participants wear the SenseDoc for ten consecutive days even if there are a couple of unusual days in the mix.
I WORK AT A HOSPITAL AND AM REQUIRED TO KEEP MY PHONE IN AIRPLANE MODE. WILL I BE ABLE TO USE THE SENSEDOC?
Yes. As all electronic devices sold in Canada, SenseDoc devices have been through a rigorous testing procedure for electromagnetic compatibility. Moreover, for the INTERACT study, we are collecting data in passive mode on the SenseDoc and all emission sources have been shut down. No data is transmitted via a cellular network.
THE DEVICE IS NO LONGER SHOWING A FLASHING GREEN LIGHT. IS THIS A PROBLEM?
If the device is showing a red light or a solid green light, then it is no longer collecting data. Please get in touch with the study coordinator as soon as possible.
WHAT IS THE MEANING OF THE TWO LEDs?
The LED next to the USB plug will display a solid red when the device is plugged in and in charge.
The other LED on the top indicates the SenseDoc status. Here is some additional information:
- It should be flashing green when you wear it, as this is the acquisition mode (GPS and accelerometer data is being collected).
- When the battery needs to be recharged, the LED will be flashing rapidly twice (~about 30% charge left) or thrice (less than ~10% charge); please plug the SenseDoc as soon as possible.
- When no movement is detected, the SenseDoc will fall asleep to save battery. In this state the status LED will flash very briefly from time to time. Touching the device will resume normal acquisition.
- Finally, when the device is charging, this LED will display a solid green – this is normal. However, when not in charge, a solid light – green or red – indicates a problem with the device (see question above). Please get in touch with the study coordinator as soon as possible.
WHAT INFORMATION IS RECORDED?
The SenseDoc continuously records GPS signals that are being sent by GPS satellites. This information allows the device to determine its geographic location. We also record movement with an internal accelerometer. An accelerometer is a tiny sensor that records movement along three axes (x,y,z) and is used in all types of devices, including in smartphones or in fitness wearables. By continuously recording movement and location, we can determine where and when participants are physically active or sedentary, and we can also use this geographic location to map people’s surroundings. This information is important for us as we are interested in how urban environments influence mobility and physical activity.
IS THE SENSEDOC RELEASING DANGEROUS EMISSIONS?
The SenseDoc is not emitting any electric signals, so it is entirely safe for use. It has gone through rigorous testing and has received approval for use by all regulatory bodies in Canada, USA, and Europe.