BBC News | SCI/TECH | Reading your mouse movements

"Just by looking at the way the mouse moves, I can tell whether you are reading a web page," says Ted Selker, an MIT professor focusing on context-aware computing.
"I can tell because when you read a webpage, you do one of a couple of things. You either shovel the mouse off to the right so that it is out of the way, or you will walk down the page with your mouse," he told the BBC's Go Digital programme.