Estimating acceptable noise-levels on gaze and mouse selection by zooming

The goal of this research is to estimate the maximum amount of noise of a pointing device that still makes interaction with a Windows interface possible. This work proposes zoom as an alternative activation method to the more well-known interaction methods (dwell and two-step- dwell activation). We present a magnifier called
ZoomNavigator
that uses the zoom principle to interact with an interface. Selection by zooming was tested with white noise in a range of 0 to 160 pixels in radius on an eye tracker and a standard mouse. The mouse was found to be more accurate than the eye tracker. The zoom principle applied allowed successful interaction with the smallest targets found in the Windows environment even with noise up to about 80 pixels in radius. The work suggests that the zoom interaction gives the user a possibility to make corrective movement during activation time eliminating the waiting time found in all types of dwell activations. Furthermore zooming can be a promising way to compensate for inaccuracies on low-resolution eye trackers or for instance if people have problems controlling the mouse due to hand tremors.