id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-028455-1swijiq3	Serban, Iulian Vlad	A Large-Scale, Open-Domain, Mixed-Interface Dialogue-Based ITS for STEM	2020-06-10		.txt	text/plain	1908	106	52	To facilitate learning across a wide range of STEM subjects, Korbit uses a mixed-interface, which includes videos, interactive dialogue-based exercises, question-answering, conceptual diagrams, mathematical exercises and gamification elements. Although Korbit was designed to be open-domain and highly scalable, A/B testing experiments with real-world students demonstrate that both student learning outcomes and student motivation are substantially improved compared to typical online courses. As observed by Olney [14] : "Unfortunately, ITS are extremely expensive to produce, with some groups estimating that it takes 100 h of authoring time from AI experts, pedagogical experts, and domain experts to produce 1 h of instruction." On the other hand, lower-cost educational approaches, such as massive open online courses (MOOCs), have flourished and now boast of having millions of learners. Korbit is a large-scale, open-domain, mixed-interface, dialogue-based ITS, which uses machine learning, natural language processing (NLP) and reinforcement learning (RL) to provide interactive, personalized learning online.	./cache/cord-028455-1swijiq3.txt	./txt/cord-028455-1swijiq3.txt