The Sociometer

Invented by three students at the University of Dundee, the Sociometer is designed to measure how much time people at pubs (or in any social environment) are spending on their phones, as opposed to being social. It does this by measuring WiFi activity and recording it on a scrolling piece of graph paper.

They tested it in a Dundee pub and found that "people were still attached to their phones even at peak times when they were surrounded by friends."

More info: thesociometer.com, University of Dundee, the scotsman.