People often use more than one query when searching for information. We revisit search results to re-find information and build an understanding of our search need through iterative explorations of query formulation. Unfortunately, these tasks are not well supported by search interfaces and web browsers. The only indication of our search process we get is a different colored link to pages we already have visited. In our previous research, we found that a simple query preview widget helped people formulate more successful queries and more efficiently explore the search results. However, the query preview widget would not work with regular search engines since it required back-end support. To bring support for exploratory search to common search engines, such as Google, Bing or Yahoo, we designed and built a Chrome browser plug-in, SearchPanel.
When moving away from the search page, SearchPanel stays put and provides a short cut for accessing the search results. The search result being explored is indicated in SearchPanel by a circle. Moving the mouse over a bar in SearchPanel when not on the search page, displays the search result snippet.
We evaluated SearchPanel in a real world deployment and found that appears to have been primarily used for complex information needs, in search sessions with long durations and high numbers of queries. For search session with single queries, we found very little use of SearchPanel. Based on our evaluation, we conclude that SearchPanel appears to be used in the way it was designed; when it is not needed it is out of the way and not used, but when one simple query does not answer the search need, SearchPanel is used for supporting the information seeking process. More details about SearchPanel can be found in our SIGIR 2014 paper.