Abstract

Inspired by Hill and Hollan's original work [6], we have been developing a theory of interaction history and building tools to apply this theory to navigation in a complex information space. We have built a series of tools --- map, trails, annotations and signposts --- based on a physical-world navigation metaphor. These tools have been in use for over a year. Our user study involved a controlled browse task and showed that users were able to get the same amount of work done with significantly less effort. Keywords information navigation, information foraging, interaction history, Web browsing INTRODUCTION Digital information has no history. It comes to us devoid of the patina that forms on physical objects as they are used. In the non-digital world we make extensive use of these traces to guide our actions, to make choices, and to find things of importance or interest. We call this area interaction history; that is, the records of the interactions of people and objects. Physical o...