In interviews, Quantum Country readers have variously told us that the embedded questions push them to read more carefully, or that the questions help them notice when their focus isn’t sharp. Leaving aside the direct effect of the prompts on memory, the Mnemonic medium’s questions may simply help readers slow down and pay attention when they read. Understanding requires effortful engagement, so this effect may produce deeper understanding.
It would be interesting to empirically compare the amount of time readers spend on an essay with and without questions, subtracting off the amount of time mnemonic medium readers spend directly engaged with questions. Eye-tracking data would be interesting tool.