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Quantitative assessment of diagnostic ability.

G Bordage1, J Grant, P Marsden

  • 1Postgraduate Medical Centre, Greenwich District Hospital, London.

Medical Education
|September 1, 1990
PubMed
Summary

This study developed a 41-item diagnostic thinking inventory to assess medical professionals. The tool effectively differentiates between weaker and stronger diagnosticians, aiding in targeted educational improvements.

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Area of Science:

  • Medical Education
  • Cognitive Psychology
  • Clinical Reasoning

Background:

  • Diagnostic thinking is crucial for medical professionals.
  • Existing research by Bordage and Grant & Marsden highlights key variables in diagnostic reasoning.
  • A need exists for a validated tool to measure diagnostic thinking proficiency.

Purpose of the Study:

  • To develop and refine a diagnostic thinking inventory.
  • To measure flexibility in thinking and knowledge structure in memory.
  • To identify items that discriminate between varying levels of diagnostic skill.

Main Methods:

  • Development of a 56-item inventory using a semantic differential scale.
  • Inclusion of 270 participants across nine medical education and practice stages.
  • Calculation of discrimination indices to revise the inventory to 41 items.

Main Results:

  • The revised 41-item inventory demonstrated variance and discrimination across participants.
  • All subjects found the inventory exercise meaningful.
  • The inventory successfully differentiated between weaker and stronger diagnosticians.

Conclusions:

  • The developed diagnostic thinking inventory is a viable tool for assessment.
  • The inventory can be used to identify areas for improvement in diagnostic skills.
  • Future applications include assessing individual diagnostic thinking and informing educational strategies.

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