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RECOGNISING HUMAN FACTORS IN EVALUATING USER INTERFACES IN HEALTHCARE
B. Kane1, L. Longo
1IRCSET Research Fellow
Overview
• Background
• Method
• Results
• Conclusion
Background – Evaluation of Use
• Nielsen’s Heuristics• 10 Usability principles
• Aerospace and Automotive Industry
• NASA
• Healthcare - Context of Use
• Pilot
Method
• Pilot Study
• Two House Officers + Two Wards (1 each)
• Ward A: 18 Long-Stay Elderly Patients with HIGH Dependency Scores
• Ward B: 10 Short-Stay Patients, Respite Care with Lower Dependency Scores than Ward A
• Questionnaire on use of EPR – over 5 days• Nielsens’s Heuristics & NASA-TLX
• Analysis
Nielsen’s Heuristics
• Feedback
• Speak User’s Language
• Clearly marked exits
• Consistency
• Prevent Errors
• Minimise User Memory Load
• Shortcuts
• Simple Dialogue
• Good Error Messages
• Help and Documentation
NASA-TLX
• Mental Demand
• Physical Demand
• Temporal Demand
• Effort
• Performance
• Frustration
Results - Overall Nielsen US
B
A
Results - Overall NASA-TLX
A
B
Results - Overall NASA-TLX – HMW
Ward A: High Dependency Scenario Ward B: Lower Dependency Scenario
Results - Interpretation• Usability of EHR can vary over time
• As clinicians approach the end of their working day, performance dramatically declines
• As a result of Decreased Performance, more Effort needed
• Usability Evaluation methods in Healthcare should be more refined to give better information
Conclusion
• Nielsen’s Principles, while helpful, do not take into account • Context of System Use• Impact of User’s Mental Workload
• Human Factors should be incorporated into System Evaluation in Healthcare
• More Research is needed into task issues in healthcare and usability
Reference
L. Longo and B. Kane, 2011,
A Novel Methodology for Evaluating User Interfaces in Health Care
Pages 1-6, 24th IEEE International Symposium on Computer-
Based Medical Systems (CBMS), Bristol, England
DOI 10.1109/CBMS.2011.5999024
Acknowlegements• R. T. Venkateshappa, R. Ravikuma and K. Nagesh for
helping in gathering data.
• B. Kane is funded through the IRCSET Enterprise Partnership scheme with St. James’s Hospital Board, Dublin
• St James’s Hospital Board
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