00377nam a2200109Ia 4500008004100000245012600041260003500167260000900202300000800211500002100219650002700240170224s9999 xx 000 0 und d aMining Student-Generated Textual Data in MOOCs and Quantifying Their Effects on Student Performance and Learning Outcomes bComputers in Education Journal c2014 a5:4 aOctober-December xInformation Technology