Recognising Human Factors In Evaluating User Interfaces In Healthcare - Bridget Kane

RECOGNISING HUMAN FACTORS INEVALUATING USER INTERFACES INHEALTHCAREB. 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 • Minimise User Memory Load• Speak User’s Language • Shortcuts• Clearly marked exits • Simple Dialogue• Consistency • Good Error Messages• Prevent Errors • Help and Documentation

NASA-TLX• Mental Demand• Physical Demand• Temporal Demand• Effort• Performance• Frustration

Results - Overall Nielsen USAB

Results - Overall NASA-TLXAB

Results - Overall NASA-TLX – HMWWard 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

ReferenceL. Longo and B. Kane, 2011,A Novel Methodology for Evaluating User Interfaces in Health CarePages 1-6, 24th IEEE International Symposium on Computer-Based Medical Systems (CBMS), Bristol, EnglandDOI 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

Recognising Human Factors In Evaluating User Interfaces In Healthcare - Bridget Kane

by healthcareisi on Nov 28, 2011

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