e.g. mhealth
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In addition, 3 usability heuristics specific to information visualizations in the dashboards were included: spatial organization, information coding, and orientation [19].
Usability heuristics and their definitions used in the heuristic usability evaluation.
a HIT: health information technology.
Severity ratings for usability violations in the heuristic evaluation.
JMIR Hum Factors 2025;12:e64131
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The second stage, alpha testing, was focused on identifying and resolving general usability issues, ensuring data transfer integrity, collecting evidence on digital ergonomics and usability perception, and evaluating the app’s content validity through an expert panel [37].
JMIR Serious Games 2025;13:e66167
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Although not all user errors result from design flaws, usability evaluations conducted before commercialization can effectively mitigate design-related issues [8,9]. Usability engineering processes play a vital role in identifying and addressing predictable user errors in clinical environments, ensuring the safety and efficiency of medical devices [10,11].
Usability evaluations can be categorized as formative or summative, depending on the timing and purpose of the evaluation [12].
JMIR Form Res 2025;9:e68149
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To allow for meaningful comparisons of feedback, our recruitment strategy aimed to include participants with varying levels of experience using the Pro Herz app, aligning with best practices in end-user and usability testing. Medical experts were recruited through Pro Carement, where they interact with the Pro Herz users in their daily work. All experts were nurses with long-term experience in heart failure care.
JMIR Hum Factors 2025;12:e56798
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Usability was assessed using the System Usability Scale (SUS). The SUS is a validated usability questionnaire that has been used in clinical settings to assess the usability of various systems and tools [33,34]. The SUS includes 10 statements rated on a 5-point Likert scale (from 1=strongly disagree to 5=strongly agree). The score ranges from 0 to 100 with a score higher than 70 being considered acceptable [35].
JMIR Cardio 2025;9:e58124
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The System Usability Scale (SUS) [37] was used for this purpose. It is a methodological tool similar to the Likert Scale that measures the usability of an object, device, and application. The scale consists of 10 questions that can be scored from 1 to 5, where 1 means “Strongly disagree” and 5 means “Strongly agree” (Multimedia Appendix 1).
JMIR Serious Games 2025;13:e54312
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The validated Telehealth Usability questionnaire (TUQ) was used with minor modifications to capture relevant information to the specific use case [13]. The modified questionnaire (m TUQ) was developed with input from clinicians, engineers, a medical physicist, and a senior intensive care nurse.
The survey consisted of 40 questions in total.
JMIR Hum Factors 2025;12:e54560
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Finally, we trained a supervised machine learning model and developed pathways (D) to classify individuals using features most consistently linked to CCP subgroups before evaluating its diagnostic validity and usability on an external cohort. Pathologically abnormal diagnoses consisted of CIN1, CIN2, CIN3, and carcinoma.
JMIR Public Health Surveill 2025;11:e67840
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Thus, older adults might face several usability issues, such as navigation difficulties [22]. Usability is defined by the International Organization for Standardization 9241-11 standard as the “extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency, and satisfaction in a specified context of use” [23].
J Med Internet Res 2025;27:e64249
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Identifying Strategies for Home Management of Ostomy Care: Content Analysis of YouTube
Usability studies examining the interaction between medical device technology and end users are essential for developing medical devices that are safe and effective [12]. These studies allow for actively including end users in the design process while considering end user competencies and environment, thus, continuously improving medical device design to fit user needs [13].
JMIR Hum Factors 2025;12:e66634
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