Browsing by Subject "Usability"

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    Open Access
    A consumer neuroscientific method for assessing usability: eye-tracking visual fatigue in visually complex M-commerce applications
    (2025) Johnson, Alexandra; Pillay, Pragasen; Drummond, Mark; Vahed, Ashraf; Fouche, Jean-Paul
    Purpose: Mobile commerce (m-commerce) applications (apps) need to be studied in terms of their visual element richness, usability and how these impact the visual fatigue that is felt by users and their overall system usage. The purpose of this paper is to present and discuss a conceptual model that seeks to establish a method for measuring visual fatigue using eye-tracking and examine its relationship with usability across varying levels of visual complexity in m-commerce apps. It aims to develop and extend existing research on the design of m-commerce apps in terms of the amount of visual elements to needed to satisfy users while mitigating the effect of visual fatigue and usability issues. Study Design/Methodology/Approach: The study utilised a mixed-methods approach to gather data through utilising consumer neuroscience techniques, specifically eye tracking technology to develop an understanding between usability, visual fatigue and visual complexity when the users engage and experience a m-commerce app. This research explored 96 consumer reactions and responses to different visually complex m-commerce apps. Mixed methods is needed to compliment both qualitative and quantitative results and gather a deeper understanding of the complex data. Findings: A model measuring visual fatigue through eye-tracking technology is established to better understand the impact on users within the 18-35 South African cohort when exposed to different visually complex applications. Relationships between the dimensions of visual fatigue, usability, visual complexity, phone usage and context of use are explored through hypothesis testing. Research limitations/ implications: The first contribution of this study is the addition of research on how users from South Africa experience m-commerce applications. The second contribution stems from the model established to measure visual fatigue through eye-tracking techniques to better understand users and how they navigate and experience an application. Third we established the impact of visually complex, visually simple and visually moderate designs on users satisfaction and wellbeing. Finally the study revealed important elements to users of a m-commerce application through the mixed-methods approach. Originality/Value: The findings of this study have numerous implications for both marketing managers, app developers and user experience experts. The findings supply valuable insight into how multiple visual elements impact a user's experience and satisfaction when navigating a m-commerce application. The study found that a more visually complex system did not hinder a user's experience but instead encouraged positive feedback from users.
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    Open Access
    Mobile sexual health services for adolescents: investigating the acceptability of youth-directed mobile clinic services in Cape Town, South Africa
    (2019-08-19) Smith, Philip; Tolla, Tsidiso; Marcus, Rebecca; Bekker, Linda-Gail
    Abstract Background The Human Immunodeficiency Virus (HIV) epidemic is growing rapidly among South African adolescents and young adults (AYA). Although HIV counselling and testing, HIV prevention and treatment options are widely available, many AYA delay health-seeking until illness occurs, demonstrating a need for youth responsive, integrated sexual and reproductive health services (SRHS). While feasibility and cost-effectiveness have been evaluated, acceptability of mobile clinics among AYA has yet to be established. The objective of this study was to investigate patient acceptability of mobile AYA SRHS and compare mobile clinic usage and HIV outcomes with nearby conventional clinics. Methods Patients presenting to a mobile clinic in Cape Town were invited to participate in an acceptability study of a mobile clinic after using the service. A trained researcher administered an acceptability questionnaire. Mobile clinic medical records during the study period were compared with the records of AYA attending four clinics in the same community. Results Three hundred three enrolled participants (16–24 years, 246 (81.2%) female) rated mobile AYA SRHS acceptability highly (median = 4,6 out of 5), with 90% rating their experience as better or much better than conventional clinics. The mobile clinic, compared to conventional clinics, attracted more men (26% v 13%, p < 0,000), younger patients (18 v 19 years, p < 0,000), and yielded more HIV diagnoses (4% v 2%, p < 0,000). Conclusions Given the high ratings of acceptability, and the preference for mobile clinics over conventional primary health clinics, the scalability of mobile clinics should be investigated as part of a multipronged approach to improve the uptake of SRHS diagnostic, prevention and treatment options for AYA.