J Biomed Inform - From expert-derived user needs to user-perceived ease of use and usefulness: a two-phase mixed-methods evaluation framework.

Tópicos

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{ care(1570) inform(1187) nurs(1089) }
{ first(2504) two(1366) second(1323) }
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{ data(1714) softwar(1251) tool(1186) }
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{ patient(2837) hospit(1953) medic(668) }
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{ age(1611) year(1155) adult(843) }
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{ detect(2391) sensit(1101) algorithm(908) }

Resumo

Underspecified user needs and frequent lack of a gold standard reference are typical barriers to technology evaluation. To address this problem, this paper presents a two-phase evaluation framework involving usability experts (phase 1) and end-users (phase 2). In phase 1, a cross-system functionality alignment between expert-derived user needs and system functions was performed to inform the choice of "the best available" comparison system to enable a cognitive walkthrough in phase 1 and a comparative effectiveness evaluation in phase 2. During phase 2, five quantitative and qualitative evaluation methods are mixed to assess usability: time-motion analysis, software log, questionnaires - System Usability Scale and the Unified Theory of Acceptance of Use of Technology, think-aloud protocols, and unstructured interviews. Each method contributes data for a unique measure (e.g., time motion analysis contributes task-completion-time; software log contributes action transition frequency). The measures are triangulated to yield complementary insights regarding user-perceived ease-of-use, functionality integration, anxiety during use, and workflow impact. To illustrate its use, we applied this framework in a formative evaluation of a software called Integrated Model for Patient Care and Clinical Trials (IMPACT). We conclude that this mixed-methods evaluation framework enables an integrated assessment of user needs satisfaction and user-perceived usefulness and usability of a novel design. This evaluation framework effectively bridges the gap between co-evolving user needs and technology designs during iterative prototyping and is particularly useful when it is difficult for users to articulate their needs for technology support due to the lack of a baseline.

Resumo Limpo

underspecifi user need frequent lack gold standard refer typic barrier technolog evalu address problem paper present twophas evalu framework involv usabl expert phase endus phase phase crosssystem function align expertderiv user need system function perform inform choic best avail comparison system enabl cognit walkthrough phase compar effect evalu phase phase five quantit qualit evalu method mix assess usabl timemot analysi softwar log questionnair system usabl scale unifi theori accept use technolog thinkaloud protocol unstructur interview method contribut data uniqu measur eg time motion analysi contribut taskcompletiontim softwar log contribut action transit frequenc measur triangul yield complementari insight regard userperceiv easeofus function integr anxieti use workflow impact illustr use appli framework format evalu softwar call integr model patient care clinic trial impact conclud mixedmethod evalu framework enabl integr assess user need satisfact userperceiv use usabl novel design evalu framework effect bridg gap coevolv user need technolog design iter prototyp particular use difficult user articul need technolog support due lack baselin

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