In master thesis, we present results of user studies of user experience, usability, perspicuity, and intuitiveness of mobile application 1, 2, 3 Ljubljana. Application, developed for an Android operation system, is a result of the interdisciplinary project called DriveGreen. Application is a response to the changing lifestyle, with a goal to reduce CO2 emission and help with a transition to a low-carbon society.
For the purposes of the study, we have examined professional hardware and software, which has rich functionalities and high-end performance. On the other side are the low budget devices with limited functionalities and performance. This low-end device poses only basic tools and programs for work and analysis. User is presented with a choice of using an open source software or programing his own tool, if the manufacturer of the equipment supported the last option. At the end, we have to deal with user licenses; these licenses limit the usage of the device for research purpose and limit the usability of the devices.
We divided the studies in three parts. In first part user get familiar with the purpose of the studies, we present them the 1, 2, 3 Ljubljana mobile application, and the sign the consent for cooperation in the user studies. In the second part, they get to know the eye tracking equipment and the process of workflow. At the end, they complete the user scenarios in the application. In the third part user fill out the standardised questionnaires of user experience, usability and provide a general summarization of the mobile application.
As part of the technical pre-studies, we have tested the devices and applications necessary to carry out the study. The first task was to test the design of the user interface and user scenarios and their operation on selected smart mobile device. We installed implemented prototypes scenarios on the web server to test their functionality. Overview of the eye tracking devices provides us with the best suitable device for our studies. Around the device for eye tracking, we have built the complete system with powerful notebook and mobile tablet. We adapted the bookstand to hold the eye tracker device in place during the studies.
We have collected the results of research studies and presents aggregated data for the 10 participants involved in the studies. The demographic data provides the detailed information of the participants, their education, frequency of use of smart phones, mobile applications usage. Heat graphs represent the views of user's concentration on separate screens of mobile applications during studies. Gaze graphs represent a sequence of views on the screen and show which parts of the screen was in the focus of the user. UEQ questionnaire provides information about the user experience of users; SUS questionnaire provides information of the usefulness of mobile application. We complete the process with post-questionnaire for a general impression about the satisfaction of working with the application.
We analysed the user experience and usability of the mobile application with the eye tracker. We note that the results of eye tracking are in line with the answers given by the users. Application has a high value of the UEQ questionnaire, where the measured value is 2.50. This indicates that the application is simple to user and learn. The mean value of the usability is 89. Users have pointed out the appropriate selection of the selected font style and size; they marked the design of the application as very good and used icons as easy to understand. Users have noted that they felt confident that they have a sufficient knowledge to use the application independently without assistance. Through the work with the application, we proved that the application has the ability for users to learn the work process while working with the application.
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