title: Information retrieved from a database and the augmentation of personal knowledge.
abstract: OBJECTIVE
  To assess the degree to which information retrieved from a biomedical database can augment personal knowledge in addressing novel problems, and how the ability to retrieve information evolves over time.
  
  
  METHODS
  This longitudinal study comprised three assessments of two cohorts of medical students. The first assessment occurred just before student course experience in bacteriology, the second occurred just after the course, and the third occurred five months later. At each assessment, the students were initially given a set of bacteriology problems to solve using their personal knowledge only. Each student was then reassigned a sample of problems he or she had answered incorrectly, to work again with assistance from a database containing information about bacteria and bacteriologic concepts. The initial pass through the problems generated a "personal knowledge" score; the second pass generated a "database-assisted" score for each student at each assessment.
  
  
  RESULTS
  Over two cohorts, students' personal knowledge scores were very low (approximately 12%) at the first assessment. They rose substantially at the second assessment (approximately 48%) but decreased six months later (approximately 25%). By contrast, database-assisted scores rose linearly: from approximately 44% at the first assessment to approximately 57% at the second assessment, to approximately 75% at the third assessment.
  
  
  CONCLUSIONS
  The persistent increase in database-assisted scores, even when personal knowledge had attenuated, was the most remarkable finding of this study. While some of the increase may be attributed to artifacts of the design, the pattern seems to result from the retained ability to recognize problem-relevant information in a database even when it cannot be recalled.
authors.affiliation: Laboratory for Computing and Cognition, School of Medicine, University of North Carolina at Chapel Hill 27599-7530, USA.
authors.forename: R
authors.initials: R
authors.lastname: de Bliek
authors.forename: C P
authors.initials: CP
authors.lastname: Friedman
authors.forename: B M
authors.initials: BM
authors.lastname: Wildemuth
authors.forename: J M
authors.initials: JM
authors.lastname: Martz
authors.forename: R G
authors.initials: RG
authors.lastname: Twarog
authors.forename: D
authors.initials: D
authors.lastname: File
mesh_terms: D001432:Bacteriology / Q000193:education; D016208:Databases, Factual / Q000706:statistics & numerical data*; D004504:Education, Medical, Undergraduate / Q000379:methods*; D004521:Educational Measurement; D006801:Humans; D016247:Information Storage and Retrieval; D008137:Longitudinal Studies; D009657:North Carolina; D018794:Problem-Based Learning