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Avaliação da usabilidade da aplicação VA|PREVENTION em contexto real
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Introdução: A prevalência de diabetes tipo 2 em Portugal é de 10,5 %, das mais elevadas da Europa, e com tendência a aumentar. A prevenção apresenta-se como a principal ferramenta no combate a esta doença, com alterações de estilo de vida a mostrarem-se efetivas. O projeto VA|PREVENTION (Refª 2022.02969.PTDC) visa desenvolver e avaliar a efetividade e implementação de uma aplicação web com uma assistente virtual (AV) para prevenir a diabetes tipo 2 em adultos.
Objetivos: Avaliar a usabilidade da aplicação VA|PREVENTION junto dos utilizadores primários em ambiente real.
Materiais e Métodos: As normas ISO 9241-11:2018 e 25062:2025 foram utilizadas como enquadramento metodológico. Os participantes foram recrutados com base numa amostragem intencional; foi-lhes solicitado que tilizassem a aplicação no seu quotidiano durante 30 dias. Durante este período foram recolhidos dados textuais sobre a aplicação através de diários e acompanhamento telefónico. No final aplicou-se um questionário online que incluiu a versão portuguesa do Post-Study System Usability Questionnaire e perguntas abertas. Os dados textuais foram analisados tematicamente e procedeu-se à estatística descritiva dos dados quantitativos, com o apoio do Microsoft Excel.
Resultados: Obteve-se uma amostra de 19 participantes, sendo 11 mulheres (57,9%) e 8 homens. A média de satisfação dos participantes foi de 1,44, numa escala de 1 (mais positivo) a 7 (menos positivo), em termos médios o domínio com pior desempenho foi a qualidade da interface (1,61); a utilidade do sistema pontuou 1,35 e a qualidade da interface 1,45. Contabilizara-se oito problemas, sendo que a “Impossibilidade de visualizar o vídeo introdutório” e “Falhas de som no discurso da Ema” apresentarem três reportes cada.
Conclusão: A aplicação VA|PREVENTION demonstrou uma usabilidade favorável neste contexto de utilização. Os problemas e defeitos de usabilidade identificados são um contributo para otimizar a experiência de utilização.
Introduction: The prevalence of type 2 diabetes in Portugal is 10.5%, one of the highest in Europe, and it is expected to increase. Prevention stands out as the main tool in combating this disease, with lifestyle changes proving effective. The VA|PREVENTION project (Ref. 2022.02969.PTDC) aims to develop and evaluate the effectiveness and implementation of a web application featuring a virtual assistant (VA) to prevent type 2 diabetes in adults. Objectives: To assess the usability of the VA|PREVENTION application among primary users in a real-world setting. Materials and Methods: The ISO 9241-11:2018 and ISO 25062:2025 standards were used as methodological frameworks. Participants were recruited through purposive sampling and asked to use the application in their daily lives for 30 days. During this period, textual data on the application were collected through diaries and telephone follow-ups. At the end, an online questionnaire was administered, which included the Portuguese version of the Post-Study System Usability Questionnaire and open-ended questions. Textual data were analyzed thematically, and descriptive statistics were applied to the quantitative data using Microsoft Excel. Results: The sample consisted of 19 participants, 11 women (57.9%) and 8 men. The average satisfaction score was 1.44 on a scale from 1 (most positive) to 7 (least positive). On average, the domain with the lowest performance was interface quality (1.61); system usefulness scored 1.35, and information quality 1.45. Eight usability problems were identified, with “Inability to view the introductory video” and “Sound failures in Ema’s speech” being the most frequently reported (three reports each). Conclusion: The VA|PREVENTION application demonstrated favorable usability in this usage context. The identified usability issues and defects provide valuable input for optimizing the user experience.
Introduction: The prevalence of type 2 diabetes in Portugal is 10.5%, one of the highest in Europe, and it is expected to increase. Prevention stands out as the main tool in combating this disease, with lifestyle changes proving effective. The VA|PREVENTION project (Ref. 2022.02969.PTDC) aims to develop and evaluate the effectiveness and implementation of a web application featuring a virtual assistant (VA) to prevent type 2 diabetes in adults. Objectives: To assess the usability of the VA|PREVENTION application among primary users in a real-world setting. Materials and Methods: The ISO 9241-11:2018 and ISO 25062:2025 standards were used as methodological frameworks. Participants were recruited through purposive sampling and asked to use the application in their daily lives for 30 days. During this period, textual data on the application were collected through diaries and telephone follow-ups. At the end, an online questionnaire was administered, which included the Portuguese version of the Post-Study System Usability Questionnaire and open-ended questions. Textual data were analyzed thematically, and descriptive statistics were applied to the quantitative data using Microsoft Excel. Results: The sample consisted of 19 participants, 11 women (57.9%) and 8 men. The average satisfaction score was 1.44 on a scale from 1 (most positive) to 7 (least positive). On average, the domain with the lowest performance was interface quality (1.61); system usefulness scored 1.35, and information quality 1.45. Eight usability problems were identified, with “Inability to view the introductory video” and “Sound failures in Ema’s speech” being the most frequently reported (three reports each). Conclusion: The VA|PREVENTION application demonstrated favorable usability in this usage context. The identified usability issues and defects provide valuable input for optimizing the user experience.
Descrição
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Palavras-chave
Intervenção digital Diabetes tipo 2 Usabilidade Prevenção