The research team has trialled the use of digital sensors in a sample of UK households, correlating measures of location, movement, light and noise levels, particulates, temperature, humidity and device use.
Households come in all shapes and sizes, varying in how rooms are organised, devices and energy sourced, how many occupants they have and the purposes for which members spend their time at home. For this field trial we collected data from fixed and mobile sensors, managing the intensive measurement they afford of state, location and activity.
The trial is also intended to show how this method, when applied in an intimate setting, affects respondent burden, consent, privacy and data security, and how data can be converted into meaningful descriptions of socially relevant activities in conjunction with questionnaires and interviews, and the 4-day time-use diaries we asked our participants to keep.
Researchers working on the field trial:
Dr Kristrún Gunnarsdóttir – CRESS Research Fellow
Dr Jie Jiang – CRESS Research Fellow
Dr Riccardo Pozza – ICS / 5GIC Research Fellow
See also the HomeSense field trial news category
HomeSense field trial
Installations in households start again
Mid-January and we have a few more households lined up for participation.
Collecting sensors before Christmas
Collecting from the last households before Christmas vacation and we now have 13 good ones completed, but we need 20 to meet our target so we now take advantage of Royal Mail to distribute flyers around the Guildford area.
Last installations before Christmas
Mid-September and a few more installations still to do. Each installation runs for about 10-12 weeks.
Field trial begins
End of June and the very first households are up and running, and more scheduled for installation in the coming weeks.
Festival of Wonder
A Free Day Of Fun, Imagination and Discovery
13 May 2017, celebrated the 50 year anniversary of the University of Surrey. The event attracted thousands of people interested in show-and-tell science, from all across the south of England. The research team operated a full-day demonstration of HomeSense field trial technology, titled: “Making sense of the 21st century household
”. This opportunity to engage a public audience in playing around with the sensor suite, observing and discussing with them what the sensors capture, resulted in recruitment of a number of households.
The EGG taking shapes…
End of April and the EGG
now gone through a number of design iterations, the last one with added Bluetooth module.
Time to recruit for the field trial
With a favourable ethical opinion from the University of Surrey Ethics Committee, recruitment has started with flyers going up around campus, in town, in community centres and online bulletin boards. Not much response so far.
Favourable ethical opinion from the Ethics Committee
Resubmitting the ethics review application
Revising the ethics review application
The ethics review application is back with questions for us to address. Key issues turn on ensuring an adequately informed consent (and assent) from all types of participants including those who participate indirectly (e.g. children, guests and domestic labourers). Apparently, we didn't produce an adequate risk-assessment either.
Second test house
A full trial run in a two-person household (couple), knowing that we are still testing for anomalies and unforeseen issues throughout the whole process. For instance, we couldn't foresee that an EGG ends up on top of an empty box for eggs for support
because the wall-mount fails.
Ethics review application submitted
Things that go wrong
It's a long list, the incident list. Routers don't work, sensors don't stay put, get knocked down, are badly placed and don't capture what they are supposed to capture. The consent forms are inadequate, interviews could get a bit awkward, and are we prepared for children, shared households, chaotic lifestyles, dogs, hamsters. etc?
First test house
Time to take the sensor-suite out of the controlled environment and see how the devices do when they are installed in a house of a generous friend willing to help us out. With a data server and database environment up and running, data transmission tested and encrypted, a design of consent forms, walking interview, questionnaire and time use diary - all in hand - here was a test house to trial ALL our research instruments and discover every which way they can go wrong. Essential testing in order to wrap-up the ethics-review application.
Still adapting and testing
By June we were still building, adapting and testing the EGG
and how to utilise activity sensors, but the next task is to see if we can adapt the electricity monitoring kit
, used by our colleagues working on the WholeSEM project
Adaptation and testing
A good part of May was spent testing a variety of activity wristbands
, comparing their measurements on our own arms, and by asking colleagues to wear them over a number of days.
Agreement between measures of the medically-graded Actiwatch (blue) and the ~£20 MiBand (green).
Building and adapting devices
Building and adapting devices started already in Feb 2016. The first task was to get onboard with the development of the WiFi-enabled ICS Desk Egg
, to gradually adapt the design to our field trial and thoroughly test the built-in sensors capturing range