The hand moves the computer mouse, but the cursor doesn’t comply. The cursor doesn’t go where told. The hand tries again. The cursor shoots past the intended target. The hand tries a third time – and the cursor loops farther from the target than where it started. And the user is frustrated. So it often goes for computer users whose motor disabilities prevent them from easily using a mouse. As the population ages, more people are having trouble with motor control, but a University of Washington team has invented two mouse cursors that make clicking targets a whole lot easier....
