Up to six minutes: optimal MOOC video length for student engagement - 1 views
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Seb Schmoller on 31 Oct 13Philip Guo presents preliminary research about video usage in some edX MOOCs. Strong evidence for keeping them short.
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David Jennings on 02 Nov 13My instinct is to beware of research findings that purport to be universal and context-independent. But since the context here is MOOCs, broadly defined, this research on the optimal length of instructional videos may be relevant to us.