Browsing by Author "Yen, Po-Yin"
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- ItemAssessment of the Health IT Usability Evaluation Model (Health-ITUEM) for evaluating mobile health (mHealth) technology.(2013-11-27) Brown, William; Yen, Po-Yin; Rojas, Marlene; Schnall, RebeccaBACKGROUND Over two decades of research has been conducted using mobile devices for health related behaviors yet many of these studies lack rigor There are few evaluation frameworks for assessing the usability of mHealth which is critical as the use of this technology proliferates As the development of interventions using mobile technology increase future work in this domain necessitates the use of a rigorous usability evaluation framework METHODS We used two exemplars to assess the appropriateness of the Health IT Usability Evaluation Model Health ITUEM for evaluating the usability of mHealth technology In the first exemplar we conducted 6 focus group sessions to explore adolescents use of mobile technology for meeting their health Information needs In the second exemplar we conducted 4 focus group sessions following an Ecological Momentary Assessment study in which 60 adolescents were given a smartphone with pre installed health related applications apps DATA ANALYSIS We coded the focus group data using the 9 concepts of the Health ITUEM Error prevention Completeness Memorability Information needs Flexibility Customizability Learnability Performance speed Competency Other outcomes To develop a finer granularity of analysis the nine concepts were broken into positive negative and neutral codes A total of 27 codes were created Two raters R1 and R2 initially coded all text and a third rater R3 reconciled coding discordance between raters R1 and R2 RESULTS A total of 133 codes were applied to Exemplar 1 In Exemplar 2 there were a total of 286 codes applied to 195 excerpts Performance speed Other outcomes and Information needs were among the most frequently occurring codes CONCLUSION Our two exemplars demonstrated the appropriateness and usefulness of the Health ITUEM in evaluating mobile health technology Further assessment of this framework with other study populations should consider whether Memorability and Error prevention are necessary to include when evaluating mHealth technology
- ItemA Multi-Level Usability Evaluation of Mobile Health Applications: A Case Study.(0000-00-00) Cho, Hwayoung; Yen, Po-Yin; Dowding, Dawn; Merrill, Jacqueline; Schnall, RebeccaOBJECTIVE To report a methodological approach for the development of a usable mHealth application app MATERIALS AND METHODS This work was guided by a 3 level stratified view of health information technology IT usability evaluation framework We first describe a number of methodologies for operationalizing each level of the framework Following the description of each methodology we present a case study which illustrates the use of our preferred methodologies for the development of a mHealth app At level 1 user task we applied a card sorting technique to guide the information architecture of a mobile HIV symptom self management app entitled mVIP At level 2 user task system we conducted a usability evaluation of the mVIP in a laboratory setting through end user usability testing and heuristic evaluation with informatics experts At level 3 user task system environment usability of the mVIP was evaluated in a real world setting following the use of the app during a 3 month trial RESULTS The 3 level usability evaluation guided our work exploring in depth interactions between the user task system and environment Integral to the findings from the 3 level usability evaluation we iteratively refined the app s content functionality and interface to meet the needs of our intended end users DISCUSSION AND CONCLUSION The stratified view of the health IT usability evaluation framework is a useful methodological approach for the design development and evaluation of mHealth apps The methodological recommendations for using the theoretical framework can inform future usability studies of mHealth apps
- ItemTeleconsultation Using Mobile Phones for Diagnosis and Acute Care of Burn Injuries Among Emergency Physicians: Mixed-Methods Study.(0000-00-00) Klingberg, Anders; Wallis, Lee Alan; Hasselberg, Marie; Yen, Po-Yin; Fritzell, Sara CarolineBACKGROUND The referral process in acute care remains challenging in many areas including burn care Mobile phone apps designed explicitly for medical referrals and consultations could streamline the referral process by using structured templates and integrating features specific to different specialties However as these apps are competing with commercial chat services usability becomes a crucial factor for successful uptake OBJECTIVE The aim of this study was to assess the usability of a mobile phone app for remote consultations and referrals of burn injuries METHODS A total of 24 emergency doctors and 4 burns consultants were recruited for the study A mixed methods approach was used including a usability questionnaire and a think aloud interview Think aloud sessions were video recorded and content analysis was undertaken with predefined codes relating to the following 3 themes ease of use usefulness of content and technology induced errors RESULTS The users perceived the app to be easy to use and useful but some problems were identified Issues relating to usability were associated with navigation such as scrolling and zooming Users also had problems in understanding the meaning of some icons and terminologies Sometimes some users felt limited by predefined options and they wanted to be able to freely express their clinical findings CONCLUSIONS We found that users faced problems mainly with navigation when the app did not work in the same way as the other apps that were frequently used Our study also resonates with previous findings that when using standardized templates the systems should also allow the user to express their clinical findings in their own words