When relevance judgement is happening? an EEG-based study

Marco Allegretti, Yashar Moshfeghi, Maria Hadjigeorgieva, Frank E. Pollick, Joemon M. Jose, Gabriella Pasi

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

15 Citations (Scopus)

Abstract

Relevance is a central notion in Information Retrieval, but it is considered to be a difficult concept to define. We analyse brain signals for the first 800 milliseconds (ms) of a relevance assessment process to answer the question "when relevance is happening in the brain?" with the belief that it will lead to better operational definitions of relevance. For this purpose, we devised a user study in which we captured the brain response of 20 participants. Using a 64-channel EEG device, we measured the electrophysiological activity of the brain while the subjects were in the phase of giving an explicit judgement about the relevance of presented images according to a given topic. Analyses were then performed over different time windows of the recorded EEG signals using repeated measures ANOVA. Data reveal significant variation between relevance and non-relevance within the EEG signals from the presentation of the image to 800 milliseconds afterwards. At an early stage these differences were located at frontal and posterior electrode sites. However, at later stages these differences were located in central, centro-parietal and centro-frontal areas.Our findings are an important step towards (i) a better understanding of the concept of relevance and (ii) a more effective implicit feedback systems.
Original languageEnglish
Title of host publicationProceedings of the 38th International ACM SIGIR Conference on Research and Development in Information Retrieval
Place of PublicationNew York, NY
Pages719-722
Number of pages4
DOIs
Publication statusPublished - 9 Aug 2015
Event38th International ACM SIGIR Conference on Research and Development in Information Retrieval - Santiago, Chile
Duration: 9 Aug 201513 Aug 2015

Conference

Conference38th International ACM SIGIR Conference on Research and Development in Information Retrieval
CountryChile
CitySantiago
Period9/08/1513/08/15

Keywords

  • information retrieval
  • relevance
  • brain response
  • EEG

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  • Cite this

    Allegretti, M., Moshfeghi, Y., Hadjigeorgieva, M., Pollick, F. E., Jose, J. M., & Pasi, G. (2015). When relevance judgement is happening? an EEG-based study. In Proceedings of the 38th International ACM SIGIR Conference on Research and Development in Information Retrieval (pp. 719-722). https://doi.org/10.1145/2766462.2767811