This is worth noting. "The coherence principle states that all non-essential information in multimedia messages should be eliminated to minimise demands on cognitive resources." So we should keep our online learning on topic and unadorned with any extra context-specific information, even if it's drop-dead boring. But does hold in real life? Maybe not. This study "suggests that in authentic learning settings, interest may mitigate the effects of the coherence principle." It may be that relevance is important after all. Which make, to me, rather more intuitive sense. Treating 'cognitive load' as though it were a constant seems absurd. PDF. Via Helge Scherlund.
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