title: "Understanding In-Video Dropouts and Interaction Peaks in Online Lecture Videos" authors: Juho Kim, Philip J. Guo, Daniel T. Seaton, Piotr Mitros, Krzysztof Z. Gajos, Robert C. Miller venue: ACM Conference on Learning at Scale year: 2014 tweet: When many people pause/rewatch the same part of MOOC videos, they are either confused or interested abstract: > With thousands of learners watching the same online lecture videos, analyzing video watching patterns provides a unique opportunity to understand how students learn with videos. This paper reports a large-scale analysis of in-video dropout and peaks in viewership and student activity, using second-by-second user interaction data from 862 videos in four Massive Open Online Courses (MOOCs) on edX. We find higher dropout rates in longer videos, re-watching sessions (vs first-time), and tutorials (vs lectures). Peaks in re-watching sessions and play events indicate points of interest and confusion. Results show that tutorials (vs lectures) and re-watching sessions (vs first-time) lead to more frequent and sharper peaks. In attempting to reason why peaks occur by sampling 80 videos, we observe that 61% of the peaks accompany visual transitions in the video, e.g., a slide view to a classroom view. Based on this observation, we identify five student activity patterns that can explain peaks: starting from the beginning of a new material, returning to missed content, following a tutorial step, replaying a brief segment, and repeating a non-visual explanation. Our analysis has design implications for video authoring, editing, and interface design, providing a richer understanding of video learning on MOOCs. bibtex: > @inproceedings{KimMOOC2014, author = {Kim, Juho and Guo, Philip J. and Seaton, Daniel T. and Mitros, Piotr and Gajos, Krzysztof Z. and Miller, Robert C.}, title = {Understanding In-video Dropouts and Interaction Peaks In Online Lecture Videos}, booktitle = {Proceedings of the First ACM Conference on Learning @ Scale Conference}, series = {L@S '14}, year = {2014}, isbn = {978-1-4503-2669-8}, location = {Atlanta, Georgia, USA}, pages = {31--40}, numpages = {10}, url = {http://doi.acm.org/10.1145/2556325.2566237}, doi = {10.1145/2556325.2566237}, acmid = {2566237}, publisher = {ACM}, address = {New York, NY, USA}, keywords = {in-video dropout, interaction peaks, mooc, online education, peak detection., video analysis}, }