Reading a book and listening to the audiobook at the same time in hopes of higher comprehension. I first heard this term from Daniel Doyon at Render Conference, but realized I had already tried this with How to Avoid a Climate Disaster on iPad. I remember thinking it was cool, but the cost of having to buy the book and the audiobook was a turnoff that has prevented me from doing this further.
You can listen to this blurb at ~55:38 in the Render Conference Livestream