Abstract
A large amount of research efforts have focused on designing and developing ontology visualization methods over the years, but less effort in comparison has been put on evaluating usability support of these existing ontology visualization techniques particularly in rising interaction mediums such as touchscreen devices. This paper investigates the visual support of indented list visualization - traditionally designed for desktop computers - in the context of class search activities using traditional desktop computers as well as tablet computers. Using task-based user studies conducted on desktop and tablet computers, we analysed the difference between task success, task speed, eye gaze, as well as qualitative data collected from usability questionnaires, we found that the indented list visualization is not as effective on tablet computers with increased gaze activities, where many users preferred using it on desktop computers.
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