News stories relevance effects on eye-movements
Jacek Gwizdka · 2014
Relevance is a fundamental concept in information retrieval. We consider relevance from the user's perspective and ask if the degree of relevance can be inferred from eye-tracking data and if it is related to the cognitive effort involved in relevance judgments. To this end we conducted a study, in which participants were asked to find information in screen-long text documents containing news stories. Each participant responded to fourteen trials consisting of an information question followed by three documents each at a different level of relevance (irrelevant, partially relevant, and relevant). The results indicate that relevant documents tended to be continuously read, while irrelevant documents tended to be scanned. In most cases, cognitive effort inferred from eye-tracking data was highest for partially relevant documents and lowest for irrelevant documents.