Examining users' knowledge change in the task completion process

Jingjing Liu, Nicholas J. Belkin, Xiangmin Zhang, Xiaojun Yuand

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


This paper examines the changes of information searchers' topic knowledge levels in the process of completing information tasks. Multi-session tasks were used in the study, which enables the convenience of eliciting users' topic knowledge during their process of completing the whole tasks. The study was a 3-session laboratory experiment with 24 participants, each time working on one subtask in an assigned 3-session general task. The general task was either parallel or dependently structured. Questionnaires were administered before and after each session to elicit users' perceptions of their knowledge levels, task attributes, and other task features, for both the overall task and the sub-tasks. Our results support the assumption that users' knowledge generally increases after each search session, but there were exceptions in which a "ceiling" effect was shown. We also found that knowledge was correlated with users' perceptions of task attributes and accomplishment. In addition, task type was found to affect several aspects of knowledge levels and knowledge change. These findings further our understanding of users' knowledge in information tasks and are thus helpful for information retrieval research and system design.

Original languageEnglish (US)
Pages (from-to)1058-1074
Number of pages17
JournalInformation Processing and Management
Issue number5
StatePublished - Sep 2013

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Media Technology
  • Computer Science Applications
  • Management Science and Operations Research
  • Library and Information Sciences


  • Knowledge change
  • Multi-session task
  • Post-task knowledge
  • Pre-task knowledge
  • Task type


Dive into the research topics of 'Examining users' knowledge change in the task completion process'. Together they form a unique fingerprint.

Cite this