The Twin Inventors of Electronic Monitoring Still Have Regrets / Wired.com, 23 October 2007
http://www.wired.com/techbiz/startups/magazine/15-11/ps_ankle
Gary Wolf
"[...] The Gables described their invention in the journal Behavioral Science in 1964. They envisioned a system that would automatically track young offenders as they moved around a city. The kids could be rewarded for showing up at the right place at the right time: behaviour modification in the form of a game. That's not how things turned out. With its roots in psychology forgotten, electronic monitoring became just another legal sanction."