What's the best way to present video content online? Is it to present one long video, or to chunk it into a number of shorter videos? That's what this paper (12 page PDF) studies. "The major findings indicated a significant preference for chunk-style videos between 3 and 17 min duration when compared to traditional long-view didactic lecture materials." The sample size is reasonable large if unrepresentative - 1268 university students across two academic years. But is this the sort of question that can be answered by looking at averages? I would think that it varies a lot by the content, context and viewer. I don't think people would want to watch Titanic (3 hours 14 minutes) in twenty 10-minute chunks.
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