Researchers can garner vast amounts of information bearing on pollution,
epidemics, transportation, from cameras, audio recorders and other
applications built into cellphones, cheaply and efficiently.
But
how to get mobile users to cooperate? "We can 'soft control' users with
gaming or social network incentives to drive them where we want them,"
said study co-author Fabian Bustamante of Northwestern University.
For
example, a game might offer extra points if a player visits a certain
location in the real world, or it might send a player to a certain
location in a virtual scavenger hunt, according to a Northwestern
statement.
To test soft control, researchers created Android
games, including one called Ghost Hunter in which a player chases ghosts
around his neighbourhood and "zaps" them through an augmented reality
display on his phone.
In actuality, the player's zapping motion
snaps a photo of the spot where the ghost is supposedly located, said
Bustamante, associate professor of electrical engineering and computer
science at Northwestern.
In Ghost Hunter, researchers are able
to manipulate where the ghosts are placed. Some are placed in frequently
travelled areas, others are located in out-of-the-way, rarely
photographed locations.
Participants were willing to travel well
out of their regular paths to capture the ghosts helping researchers
collect photos of Northwestern's Charles Deering Library from numerous
angles and directions - a far broader range of data than the random
sampling found on Flickr.
"Playing the game seemed to be a good
enough vehicle to get people to go to these places," said John P. Rula,
McCormick graduate student, who led the study.
If this
technology were implemented on a larger scale, users would need to be
notified that their data was being collected for research purposes,
Bustamante said.
"Obviously users need to know where their data is going," he said, "and we take every measure to protect user privacy."
These findings were presented at the XIIIth Workshop on Mobile Computing Systems and Applications (HotMobile).
http://www.techgig.com/tech-news/editors-pick/Cellphone-is-the-new-tool-for-data-collection-11118