So audio can double productivity at double speed (or listen to twice) compared to actual lectures, can be reviewed, allows productive and meaningful note taking, eliminates visual distraction, stimulates the internal imagination and therefore retention, is easy to record, easy to distribute and perfect for mobile learning. That’s before we even get to the 24/7 access. On productivity, my claim that this approach ‘doubles’ productivity applies to the mathematically certain fact that you save half the time. That doesn’t mean you’ve been twice as productive in retention. Here, however, the fact that you can take notes gives an evidence-based boost of 20-30%. That combined with the use of your imagination to elaborate the learning and listening to it twice, boosts retention even further, as does the absence of visual distraction. The claim of 100% increase in retention, is therefore, approximate but credible.
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