Usability Evaluation of a Mobile Phone Based Braille Learning Application "Mbraille"

Abstract

The introduction and evaluation of Braille-learning tools are not receiving attention despite the need for talking books and Braille reading materials. As the Braille learning tools are very limited in developing countries, newly introduced tools and technological solutions need to be properly evaluated for implementation with the required improvements. The current study evaluated a smartphone-based interactive application “mBRAILLE†for teaching early Braille-writing skills in English and Bangla. The mBRAILLE is developed to provide a cheap and affordable technology to the visually impaired (VI) students in Bangladesh. The application will help them learn Braille. A two-stage evaluation was performed in Bangladesh to determine the effectiveness of the application. The first stage of evaluation was performed with five school-aged VI children and five teachers from a blind school to determine the satisfaction level of the users while interacting with the application. This evaluation focused on 5 usability criteria, namely, learnability, memorability, efficiency, error, and satisfaction. After using mBRAILLE, participants evaluated the interfaces of the application through a specific questionnaire. Evaluation results showed that mBRAILLE meets the considered usability criteria, indicating that the interaction between application and users was on a desired level of satisfaction. Additionally, teaching ability of the application was evaluated by 5 real users in the second stage of evaluation, with a positive result. Therefore, given that the application is an effective tool to learn and teach English and Bangla Braille, it can be implemented in Bangladesh to assist VI students.

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“…Previous research using MDLC describes that researchers use the Five Human Factors for evaluation in the testing section [17]. This testing approach is very related to usability evaluation [29]. Usability is a way that can be done to measure the usability level of the application [30].…”

“…The use of the Five Human Factors in the context of testing to investigate how content created in virtual reality can be delivered functionally [31]. In applications for educational purposes such as safety training, usability approaches such as the Five Human Factors are also useful to see the effectiveness of implementing a technology [29], [32] Five Human Factors consists of five main components [33]. These components are Efficiency, Learnability, Memorability, Errors and Satisfaction [17].…”