Gazing and Frowning to Computers Can Be Enjoyable

The present aim is to introduce first results of a new wearable prototype called Face Interface. The prototype was developed to carry both a video-based wearable eye tracker for pointing and a capacitive facial movement detector for selecting objects on a computer screen. The functionality of the prototype was evaluated in a controlled laboratory conditions in pointing and selecting tasks with three target diameters and three pointing distances. Also subjective ratings about the use of the device in interaction were collected. Participants achieved a mean pointing task time of 2.5 seconds with the prototype. This was improved to 1.2 seconds on average when the wearable eye tracker of the prototype was substituted by a commercial desktop eye tracker. The results revealed that target selection using the Face Interface prototype followed the Fitts´ law with correlation of r = 0.76. The participants rated the use of the prototype as enjoyable, fast and accurate.