It has been known that using diierent representations of a query retrieves diierent sets of documents. Recent work suggests that signiicant improvement in retrieval performance can be achieved by combining multiple representations of an information need. In this paper, we rst investigate a fully automatic way of generating multiple query representations for a given information problem. We produ...

Document triage is the critical point in the information seeking process when the user first decides the relevance of a document to their information need. This complex process is not yet well understood, and subsequently we have undertaken a comparison of this task in both electronic and paper media. The results reveal that in each medium human judgement is influenced by different factors, and...

In the last decade, the results of the Program for International Student Assessment (PISA) have raised the debate about the quality of the Spanish education system, influencing public opinion and policy decisions. This study aims to analyze the impact the results PISA have had in Spanish society through the articles that appeared in El País (the non-sport newspaper with the biggest circulation ...

We present results of a study comparing two different interactive information retrieval systems: one which supports positive relevance feedback as a termsuggestion device; the other which supports both positive and negative relevance feedback in this same context. The purpose of the study was to investigate the effectiveness and usability of a specific implementation of negative relevance feedb...

Depending on the task or the environment, we read texts at different speeds. Recently, a substantial amount of literature has risen in the field of predicting relevance of text documents through eye-derived metrics to improve personalization of information retrieval systems. Nevertheless, no academic work has yet addressed the possibility of such measures behaving differently when reading at di...

This paper presents a new relevance feedback technique; selectively combining evidence based on the usage of terms within documents. By considering how terms are used within documents, we can better describe the features that might make a document relevant and thus improve retrieval effectiveness. In this paper we present an initial, experimental investigation of this technique, incorporating n...

Many different communities have conducted research on the efficacy of relevance feedback in multimedia information systems. Unlike text IR, performance evaluation of multimedia IR systems tends to conform to the accepted standards of the community within which the work is conducted. This leads to idiosyncratic performance evaluations and hampers the ability to compare different techniques fairl...

This paper details our experiments carried out at TREC 2008 Relevance Feedback Track. We focused on the analysis of feedback documents, both relevant and non-relevant, to explore more useful information to improve retrieval performance. In our experiments, local co-occurrence model and a Rocchio formula were used to select good expansion terms. Five runs were submitted. These runs used differen...

Contextualisation of information is done for at least two different purposes: (1) contextualisation approaches address problems of information overload by filtering information appropriate in a certain context. (2) The presentation of information enriched with contextual information supports the recognition of its relevance and guides its understanding. We review four approaches to contextualis...