Abstract: With the increasing use of eye tracking and qualitative measures to evaluate user experience of digital websites combined with a need to retain user interest in an age of chatbots, we present a re-examination of a study comparing the user experiences on two digital library homepages using novel measures derived from saccade length (i.e., the distance a user’s gaze travels across a page). Despite such measures being unsupported by common eye tracking software, we find that saccade-based measures correlate positively with several emotions and that they can be used to indicate complex interfaces that may increase user uncertainty.
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