The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Jiajie Zhang - One of the best experts on this subject based on the ideXlab platform.
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applying Heuristic Evaluation to improve the usability of a telemedicine system
Telemedicine Journal and E-health, 2006Co-Authors: Zhihua Tang, Todd R Johnson, Douglas R Tindall, Jiajie ZhangAbstract:The development of a telemedicine system should not only take advantage of technological advances but also pay close attention to users and the human issues involved. In this paper we examine the utility of Heuristic Evaluation in improving the usability of a digital emergency medical services (EMS) system equipped on an ambulance. The digital EMS system used advanced communication technologies to help remotely located trauma specialists gain access to patient data in real-time and direct life-saving measures in a timely fashion. To improve its usability, three experts inspected prototypes of the system according to 14 software usability Heuristics. The analyses revealed information on the prevalence, severity, and nature of Heuristic violations in the user interface design. The results were subsequently utilized to guide the iterative software design process. A comparison between two consecutive prototypes showed that the second design had only half as many usability violations as the first prototype and had considerable improvement in a number of usability Heuristic categories. The validity of Heuristic Evaluation was examined in an ethnographic study of paramedics using a prototype of the system in their work environment. Users' task performances partially verified Heuristic Evaluation results. However, they also revealed problems that were not identified in Heuristic Evaluation but only became prominent during field observation. In conclusion, we argue that usability should be given high priority in the development of a telemedicine system, and that Heuristic Evaluation can be an effective and efficient way to identify usability problems in the early stage of software development.
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Heuristic Evaluation of infusion pumps implications for patient safety in intensive care units
International Journal of Medical Informatics, 2004Co-Authors: Mark J Graham, Todd R Johnson, Jiajie Zhang, Tate K Kubose, Desmond Jordan, Vimla L PatelAbstract:Summary Objective: The goal of this research was to use a Heuristic Evaluation methodology to uncover design and interface deficiencies of infusion pumps that are currently in use in Intensive Care Units (ICUs). Because these infusion systems cannot be readily replaced due to lease agreements and large-scale institutional purchasing procedures, we argue that it is essential to systematically identify the existing usability problems so that the possible causes of errors can be better understood, passed on to the end-users (e.g., critical care nurses), and used to make policy recommendations. Design: Four raters conducted the Heuristic Evaluation of the three-channel infusion pump interface. Three raters had a cognitive science background as well as experience with the Heuristic Evaluation methodology. The fourth rater was a veteran critical care nurse who had extensive experience operating the pumps. The usability experts and the domain expert independently evaluated the user interface and physical design of the infusion pump and generated a list of Heuristic violations based upon a set of 14 Heuristics developed in previous research. The lists were compiled and then rated on the severity of the violation. Results: From 14 usability Heuristics considered in this Evaluation of the Infusion Pump, there were 231 violations. Two Heuristics, "Consistency" and "Language", were found to have the most violations. The one with fewest violations was "Document". While some Heuristic Evaluation categories had more violations than others, the most severe ones were not confined to one type. The Primary interface location (e.g., where loading the pump, changing doses, and confirming drug settings takes place) had the most occurrences of Heuristic violations. Conclusion: We believe that the Heuristic Evaluation methodology provides a simple and cost-effective approach to discovering medical device deficiencies that affect a patient's general well being. While this methodology provides information for the infusion pump designs of the future, it also identifies important insights concerning equipment that is currently in use in critical care environments.
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using usability Heuristics to evaluate patient safety of medical devices
Journal of Biomedical Informatics, 2003Co-Authors: Jiajie Zhang, Todd R Johnson, Vimla L Patel, Danielle L Paige, Tate T KuboseAbstract:Objective. To modify the traditional Heuristic Evaluation method of assessing software usability so that it can be applied to medical devices and used to evaluate the patient safety of those devices through the identification and assessment of usability problems.Design. Heuristic Evaluation, a usability inspection method commonly used for software usability Evaluation, was modified and extended for medical devices. The modified method was used to evaluate and compare the patient safety of two 1-channel volumetric infusion pumps.Results. The modified Heuristic Evaluation method was successfully applied to medical devices. One hundred and ninety-two Heuristic violations were categorized for 89 usability problems identified for Pump 1, and 121 Heuristic violations were categorized for the 52 usability problems identified for Pump 2. Pump 1 had more usability problems with high severity ratings than Pump 2. In general, Pump 1 was found to have more usability issues that are likely to induce more medical errors.Conclusions. Heuristic Evaluation, when modified for medical devices, is a useful, efficient, and low cost method for evaluating patient safety features of medical devices through the identification of usability problems and their severities.
Vimla L Patel - One of the best experts on this subject based on the ideXlab platform.
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Heuristic Evaluation of paper based web pages a simplified inspection usability methodology
Journal of Biomedical Informatics, 2006Co-Authors: Mureen Allen, Suzanne Bakken, Vimla L Patel, Leanne M Currie, James J CiminoAbstract:Online medical information, when presented to clinicians, must be well-organized and intuitive to use, so that the clinicians can conduct their daily work efficiently and without error. It is essential to actively seek to produce good user interfaces that are acceptable to the user. This paper describes the methodology used to develop a simplified Heuristic Evaluation (HE) suitable for the Evaluation of screen shots of Web pages, the development of an HE instrument used to conduct the Evaluation, and the results of the Evaluation of the aforementioned screen shots. In addition, this paper presents examples of the process of categorizing problems identified by the HE and the technological solutions identified to resolve these problems. Four usability experts reviewed 18 paper-based screen shots and made a total of 108 comments. Each expert completed the task in about an hour. We were able to implement solutions to approximately 70% of the violations. Our study found that a Heuristic Evaluation using paper-based screen shots of a user interface was expeditious, inexpensive, and straightforward to implement.
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Heuristic Evaluation of infusion pumps implications for patient safety in intensive care units
International Journal of Medical Informatics, 2004Co-Authors: Mark J Graham, Todd R Johnson, Jiajie Zhang, Tate K Kubose, Desmond Jordan, Vimla L PatelAbstract:Summary Objective: The goal of this research was to use a Heuristic Evaluation methodology to uncover design and interface deficiencies of infusion pumps that are currently in use in Intensive Care Units (ICUs). Because these infusion systems cannot be readily replaced due to lease agreements and large-scale institutional purchasing procedures, we argue that it is essential to systematically identify the existing usability problems so that the possible causes of errors can be better understood, passed on to the end-users (e.g., critical care nurses), and used to make policy recommendations. Design: Four raters conducted the Heuristic Evaluation of the three-channel infusion pump interface. Three raters had a cognitive science background as well as experience with the Heuristic Evaluation methodology. The fourth rater was a veteran critical care nurse who had extensive experience operating the pumps. The usability experts and the domain expert independently evaluated the user interface and physical design of the infusion pump and generated a list of Heuristic violations based upon a set of 14 Heuristics developed in previous research. The lists were compiled and then rated on the severity of the violation. Results: From 14 usability Heuristics considered in this Evaluation of the Infusion Pump, there were 231 violations. Two Heuristics, "Consistency" and "Language", were found to have the most violations. The one with fewest violations was "Document". While some Heuristic Evaluation categories had more violations than others, the most severe ones were not confined to one type. The Primary interface location (e.g., where loading the pump, changing doses, and confirming drug settings takes place) had the most occurrences of Heuristic violations. Conclusion: We believe that the Heuristic Evaluation methodology provides a simple and cost-effective approach to discovering medical device deficiencies that affect a patient's general well being. While this methodology provides information for the infusion pump designs of the future, it also identifies important insights concerning equipment that is currently in use in critical care environments.
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using usability Heuristics to evaluate patient safety of medical devices
Journal of Biomedical Informatics, 2003Co-Authors: Jiajie Zhang, Todd R Johnson, Vimla L Patel, Danielle L Paige, Tate T KuboseAbstract:Objective. To modify the traditional Heuristic Evaluation method of assessing software usability so that it can be applied to medical devices and used to evaluate the patient safety of those devices through the identification and assessment of usability problems.Design. Heuristic Evaluation, a usability inspection method commonly used for software usability Evaluation, was modified and extended for medical devices. The modified method was used to evaluate and compare the patient safety of two 1-channel volumetric infusion pumps.Results. The modified Heuristic Evaluation method was successfully applied to medical devices. One hundred and ninety-two Heuristic violations were categorized for 89 usability problems identified for Pump 1, and 121 Heuristic violations were categorized for the 52 usability problems identified for Pump 2. Pump 1 had more usability problems with high severity ratings than Pump 2. In general, Pump 1 was found to have more usability issues that are likely to induce more medical errors.Conclusions. Heuristic Evaluation, when modified for medical devices, is a useful, efficient, and low cost method for evaluating patient safety features of medical devices through the identification of usability problems and their severities.
Todd R Johnson - One of the best experts on this subject based on the ideXlab platform.
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applying Heuristic Evaluation to improve the usability of a telemedicine system
Telemedicine Journal and E-health, 2006Co-Authors: Zhihua Tang, Todd R Johnson, Douglas R Tindall, Jiajie ZhangAbstract:The development of a telemedicine system should not only take advantage of technological advances but also pay close attention to users and the human issues involved. In this paper we examine the utility of Heuristic Evaluation in improving the usability of a digital emergency medical services (EMS) system equipped on an ambulance. The digital EMS system used advanced communication technologies to help remotely located trauma specialists gain access to patient data in real-time and direct life-saving measures in a timely fashion. To improve its usability, three experts inspected prototypes of the system according to 14 software usability Heuristics. The analyses revealed information on the prevalence, severity, and nature of Heuristic violations in the user interface design. The results were subsequently utilized to guide the iterative software design process. A comparison between two consecutive prototypes showed that the second design had only half as many usability violations as the first prototype and had considerable improvement in a number of usability Heuristic categories. The validity of Heuristic Evaluation was examined in an ethnographic study of paramedics using a prototype of the system in their work environment. Users' task performances partially verified Heuristic Evaluation results. However, they also revealed problems that were not identified in Heuristic Evaluation but only became prominent during field observation. In conclusion, we argue that usability should be given high priority in the development of a telemedicine system, and that Heuristic Evaluation can be an effective and efficient way to identify usability problems in the early stage of software development.
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Heuristic Evaluation of infusion pumps implications for patient safety in intensive care units
International Journal of Medical Informatics, 2004Co-Authors: Mark J Graham, Todd R Johnson, Jiajie Zhang, Tate K Kubose, Desmond Jordan, Vimla L PatelAbstract:Summary Objective: The goal of this research was to use a Heuristic Evaluation methodology to uncover design and interface deficiencies of infusion pumps that are currently in use in Intensive Care Units (ICUs). Because these infusion systems cannot be readily replaced due to lease agreements and large-scale institutional purchasing procedures, we argue that it is essential to systematically identify the existing usability problems so that the possible causes of errors can be better understood, passed on to the end-users (e.g., critical care nurses), and used to make policy recommendations. Design: Four raters conducted the Heuristic Evaluation of the three-channel infusion pump interface. Three raters had a cognitive science background as well as experience with the Heuristic Evaluation methodology. The fourth rater was a veteran critical care nurse who had extensive experience operating the pumps. The usability experts and the domain expert independently evaluated the user interface and physical design of the infusion pump and generated a list of Heuristic violations based upon a set of 14 Heuristics developed in previous research. The lists were compiled and then rated on the severity of the violation. Results: From 14 usability Heuristics considered in this Evaluation of the Infusion Pump, there were 231 violations. Two Heuristics, "Consistency" and "Language", were found to have the most violations. The one with fewest violations was "Document". While some Heuristic Evaluation categories had more violations than others, the most severe ones were not confined to one type. The Primary interface location (e.g., where loading the pump, changing doses, and confirming drug settings takes place) had the most occurrences of Heuristic violations. Conclusion: We believe that the Heuristic Evaluation methodology provides a simple and cost-effective approach to discovering medical device deficiencies that affect a patient's general well being. While this methodology provides information for the infusion pump designs of the future, it also identifies important insights concerning equipment that is currently in use in critical care environments.
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using usability Heuristics to evaluate patient safety of medical devices
Journal of Biomedical Informatics, 2003Co-Authors: Jiajie Zhang, Todd R Johnson, Vimla L Patel, Danielle L Paige, Tate T KuboseAbstract:Objective. To modify the traditional Heuristic Evaluation method of assessing software usability so that it can be applied to medical devices and used to evaluate the patient safety of those devices through the identification and assessment of usability problems.Design. Heuristic Evaluation, a usability inspection method commonly used for software usability Evaluation, was modified and extended for medical devices. The modified method was used to evaluate and compare the patient safety of two 1-channel volumetric infusion pumps.Results. The modified Heuristic Evaluation method was successfully applied to medical devices. One hundred and ninety-two Heuristic violations were categorized for 89 usability problems identified for Pump 1, and 121 Heuristic violations were categorized for the 52 usability problems identified for Pump 2. Pump 1 had more usability problems with high severity ratings than Pump 2. In general, Pump 1 was found to have more usability issues that are likely to induce more medical errors.Conclusions. Heuristic Evaluation, when modified for medical devices, is a useful, efficient, and low cost method for evaluating patient safety features of medical devices through the identification of usability problems and their severities.
Suzanne Bakken - One of the best experts on this subject based on the ideXlab platform.
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web based education for low literate parents in neonatal intensive care unit development of a website and Heuristic Evaluation and usability testing
International Journal of Medical Informatics, 2010Co-Authors: Jeungok Choi, Suzanne BakkenAbstract:Abstract Purpose Low health literacy has been associated with poor health-related outcomes. The purposes are to report the development of a website for low-literate parents in the Neonatal Intensive Care Unit (NICU), and the findings of Heuristic Evaluation and a usability testing of this website. Methods To address low literacy of NICU parents, multimedia educational Website using visual aids (e.g., pictographs, photographs), voice-recorded text message in addition to a simplified text was developed. The text was created at the 5th grade readability level. The Heuristic Evaluation was conducted by three usability experts using 10 Heuristics. End-users’ performance was measured by counting the time spent completing tasks and number of errors, as well as recording users’ perception of ease of use and usefulness (PEUU) in a sample of 10 NICU parents. Results Three evaluators identified 82 violations across the 10 Heuristics. All violations, however, received scores Discussion and conclusions Different types of visuals on the Website were well accepted by low-literate users and agreement of visuals with text improved understanding of the educational materials over that with text alone. The findings suggest that using concrete and realistic pictures and pictographs with clear captions would maximize the benefit of visuals. One emerging theme was “simplicity” in design (e.g., limited use of colors, one font type and size), content (e.g., avoid lengthy text), and technical features (e.g., limited use of pop-ups). The Heuristic Evaluation by usability experts and the usability test with actual users provided complementary expertise, which can give a richer assessment of a design for low literacy Website. These results facilitated design modification and implementation of solutions by categorizing and prioritizing the usability problems.
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A comparison of usability Evaluation methods: Heuristic Evaluation versus end-user think-aloud protocol - an example from a web-based communication tool for nurse scheduling.
AMIA ... Annual Symposium proceedings. AMIA Symposium, 2009Co-Authors: Po-yin Yen, Suzanne BakkenAbstract:We evaluated a web-based communication tool for nurse scheduling using two common usability Evaluation methods, Heuristic Evaluation and end-user think aloud protocol. We found that Heuristic Evaluation performed by human-computer interaction (HCI) experts revealed more general interface design problems, while end-users' think-aloud protocols identified more obstacles to task performance. To provide the most effective and thorough Evaluation results, a combination of Heuristic Evaluation and end-user think-aloud protocol is recommended.
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Heuristic Evaluation of paper based web pages a simplified inspection usability methodology
Journal of Biomedical Informatics, 2006Co-Authors: Mureen Allen, Suzanne Bakken, Vimla L Patel, Leanne M Currie, James J CiminoAbstract:Online medical information, when presented to clinicians, must be well-organized and intuitive to use, so that the clinicians can conduct their daily work efficiently and without error. It is essential to actively seek to produce good user interfaces that are acceptable to the user. This paper describes the methodology used to develop a simplified Heuristic Evaluation (HE) suitable for the Evaluation of screen shots of Web pages, the development of an HE instrument used to conduct the Evaluation, and the results of the Evaluation of the aforementioned screen shots. In addition, this paper presents examples of the process of categorizing problems identified by the HE and the technological solutions identified to resolve these problems. Four usability experts reviewed 18 paper-based screen shots and made a total of 108 comments. Each expert completed the task in about an hour. We were able to implement solutions to approximately 70% of the violations. Our study found that a Heuristic Evaluation using paper-based screen shots of a user interface was expeditious, inexpensive, and straightforward to implement.
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Heuristic Evaluation of a web based educational resource for low literacy nicu parents
Studies in health technology and informatics, 2006Co-Authors: Jeungok Choi, Suzanne BakkenAbstract:"Web-based Educational Resources for the NICU Parent," an educational website for low literacy families, was developed and implemented as prototype web pages using Macromedia Dreamweaver MX. Research has shown that evaluating a website before its implementation can reduce usability errors and improve the overall interface design. As an initial assessment of the website's interface, a Heuristic Evaluation was conducted with a sample of three usability experts. The usability experts reviewed the website with typical case scenario and completed an Evaluation form covering ten usability Heuristics. The task was completed in approximately one and a half hours; 82 Heuristic violations were reported. The Heuristic violations noted on the Evaluation forms and the experts' verbalizations captured by a usability testing tool (Morae) were content analyzed and categorized based on the potential design solutions to be implemented: function, design and layout, content, and navigation. Approximately 88% of the violations were resolved by implementing these solutions. The study findings suggest that the Heuristic Evaluation was an efficient and inexpensive method for evaluating the low literacy interface of the "Web-based Educational Resources for the NICU Parent."
James T Mcelligott - One of the best experts on this subject based on the ideXlab platform.
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toward a more usable home based video telemedicine system a Heuristic Evaluation of the clinician user interfaces of home based video telemedicine systems
JMIR Human Factors, 2017Co-Authors: Sruthy Agnisarman, Shraddhaa Narasimha, Kapil Chalil Madathil, Brandon M Welch, Fnu Brinda, Aparna Ashok, James T McelligottAbstract:Background: Telemedicine is the use of technology to provide and support health care when distance separates the clinical service and the patient. Home-based telemedicine systems involve the use of such technology for medical support and care connecting the patient from the comfort of their homes with the clinician. In order for such a system to be used extensively, it is necessary to understand not only the issues faced by the patients in using them but also the clinician. Objectives: The aim of this study was to conduct a Heuristic Evaluation of 4 telemedicine software platforms—Doxy.me, Polycom, Vidyo, and VSee—to assess possible problems and limitations that could affect the usability of the system from the clinician’s perspective. Methods: It was found that 5 experts individually evaluated all four systems using Nielsen’s list of Heuristics, classifying the issues based on a severity rating scale. Results: A total of 46 unique problems were identified by the experts. The Heuristics most frequently violated were visibility of system status and Error prevention amounting to 24% (11/46 issues) each. Esthetic and minimalist design was second contributing to 13% (6/46 issues) of the total errors. Conclusions: Heuristic Evaluation coupled with a severity rating scale was found to be an effective method for identifying problems with the systems. Prioritization of these problems based on the rating provides a good starting point for resolving the issues affecting these platforms. There is a need for better transparency and a more streamlined approach for how physicians use telemedicine systems. Visibility of the system status and speaking the users’ language are keys for achieving this. [JMIR Hum Factors 2017;4(2):e11]