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Related Experiment Videos

User interactions with the PDQ cancer information system.

D J Shaw1, R F Czaja

  • 1School of Library and Information Science, Indiana University, Bloomington 47405.

Bulletin of the Medical Library Association
|January 1, 1992
PubMed
Summary

Physician Data Query (PDQ) system searches show that while NLM

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Area of Science:

  • Information science
  • Health informatics
  • Cancer information systems

Background:

  • Online cancer information systems are crucial for healthcare professionals.
  • Physician Data Query (PDQ) is a key resource for cancer information.
  • Understanding search interface effectiveness is vital for information retrieval.

Purpose of the Study:

  • To analyze user search behavior and efficiency on the PDQ cancer information system.
  • To compare the performance of different interfaces (NLM menu-based vs. BRS command-driven) for end-users and intermediaries.
  • To identify factors influencing search completeness and user efficiency.

Main Methods:

  • Observation of search sessions by end-users (physicians) and intermediaries on the PDQ system.
  • Analysis of search steps, efficiency metrics, and search completeness.
  • Comparison of search strategies across different user groups (end-users, intermediaries, CIS searchers) and interfaces.

Main Results:

  • End-users on the NLM menu-based interface took fewer steps per question.
  • Intermediaries using the BRS command-driven interface demonstrated higher efficiency.
  • Experienced Cancer Information Service (CIS) searchers utilized command stacking effectively.
  • The NLM system, with menus and predefined formats, yielded more complete retrieval.

Conclusions:

  • Interface design significantly impacts user efficiency and search behavior in cancer information systems.
  • Menu-based interfaces may be more intuitive for end-users, while command-driven interfaces can be more efficient for experienced intermediaries.
  • User experience and training influence the adoption of advanced search techniques like command stacking.
  • System features such as menus and predefined formats enhance search completeness.

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