User experience evaluation of Edurell interface for video augmentation

This paper deals with the use of videos in education and describes an approach to improve the learners’ experience in the first-watch and rewatch learning contexts. Actually, learning through videos raises challenging issues like non-linear navigation and poor structure of the video content. Hence, a novel application is presented, designed to address such issues. To this aim, the proposed Edurell environment enriches standard video lessons with new services based on the contents’ structure of the video, resulting in a new hypervideo educational application. The system extracts the concepts explained in a given video lesson, their prerequisite relations, and the segments of the video where they occur, together with other pieces of knowledge. The resulting knowledge graph allows creating augmented video lessons and enables learners to perform non-linear navigation and in-depth exploration of their learning contents. This idea was implemented in a custom web-based video player with interactive visual tools. Then, a heuristic usability evaluation was performed with HCI experts. Also, a user study with university students was done, aimed to evaluate the perceived usability and the student’s experience in the two mentioned learning contexts. The first results achieved show the effectiveness of the proposed approach.