E-learning App Usability (objective dataset)
As suggested by Nigel Bevan 2006, a minimum number of eight to ten participants are generally required in order to make reliable estimates to uncover the usability problems of an interface, a total of 13 respondents were employed in this test. Before usability testing a consent form was signed by respondents to participate in the study. All participants were required to complete 12 tasks with the app. The participants were given time to freely explore the application before completing the tasks. The participants were given a brief introduction in the start regarding the purpose of the study. Tasks were developed using objective metrics in order to collect objective data and questionnaire was developed using subjective metrics to obtain results for subjective measures assessing satisfaction ratings with interface design. These developed instruments can be used in usability evaluation of educational apps for learners and teachers by implementing tasks performance for objective measures and using questionnaire to assess the subjective measures. It should be noted that user satisfaction is not simply correlated with performance measures such as task completion time and grade but rather can be measured from user perceptions and attitudes towards the application. The prototype was implemented and tested where 13 respondents were chosen, and used the prototype while carrying out specified tasks to complete a list of certain activities (tasks), Thereafter, 12 tasks had to be performed by the respondent including: creating a course, enrolling in a course, changing user role, modifying a course and customizing interface. The tasks were performed while paying attention to the task list as developed in the methodology.