Examining the effect of task stage and topic knowledge on searcher interaction with a "digital bookstore".

This paper reports some results from the experiment of the 2010 INEX interactive track. The experiment was designed to let searchers simulate being at two distinct stages of a work task process. Data were also collected on the test participants' topic knowledge. We have performed statistical analysis of the collected data to study differences with respect to relevance judgments and use of different types of metadata, at the different stages and for users with high and low topic knowledge.