Eyetracking (ET) adds an extra dimension to user experience design. Watching what people are looking at adds a level of interest to usability studies. Following the eye at work makes you feel as though you are in the user’s head, thinking with him. If nothing else, the ET studies are more interesting and hold observers’ attention more easily. Eyetracking technology also helps test facilitators avoid a major blunder: interrupting the user when he is quiet for a long time. This is a huge benefit since interrupting the participant too much or inappropriately is one of the greatest challenges for even seasoned usability professionals.
