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Comparison of usability evaluation methods for a health information system: heuristic evaluation versus cognitive
Mehrdad Farzandipour1,2, Ehsan Nabovati1,2, Monireh Sadeqi Jabali3,4
1Health Information Management Research Center, Kashan University of Medical Sciences, Kashan, Islamic Republic of Iran.
BMC Medical Informatics and Decision Making
|June 18, 2022
Summary
Heuristic Evaluation (HE) found more usability issues in a Hospital Information System (HIS) nursing module, while Cognitive Walkthrough (CW) identified fewer, more severe problems. HE improves overall HIS usability, whereas CW targets critical learnability issues.
Area of Science:
- Health Informatics
- Human-Computer Interaction
- Software Engineering
Background:
- Usability evaluation methods for Hospital Information Systems (HIS) lack consensus on practicality.
- This study compares two expert-based usability evaluation methods: Heuristic Evaluation (HE) and Cognitive Walkthrough (CW).
- The nursing module, a critical component of the Shafa HIS, was selected for evaluation.
Purpose of the Study:
- To compare the effectiveness of Heuristic Evaluation (HE) and Cognitive Walkthrough (CW) in identifying usability problems within a HIS nursing module.
- To determine which method is more practical for assessing HIS usability.
- To analyze the number and severity of usability issues identified by each method.
Main Methods:
- Five independent evaluators applied both Heuristic Evaluation (HE) and Cognitive Walkthrough (CW) to the Shafa HIS nursing module.
- Usability problems were cataloged based on number, severity, and specific usability attributes.
- Quantitative comparison of problems identified by HE and CW.
Main Results:
- Heuristic Evaluation (HE) identified 104 unique problems, while Cognitive Walkthrough (CW) identified 24.
- CW problems had a higher average severity (2.77) compared to HE (2.34).
- HE found more problems across most usability attributes, with significant differences noted for all except 'memorability'.
Conclusions:
- Heuristic Evaluation (HE) is effective for identifying a larger volume of usability issues, enhancing overall HIS effectiveness and user satisfaction.
- Cognitive Walkthrough (CW) excels at pinpointing fewer but more severe usability problems, particularly concerning 'learnability'.
- Both methods offer distinct advantages for HIS usability assessment, with HE recommended for broad improvements and CW for critical issue resolution.
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