Variation rules!

Researchers at Johns Hopkins are discovering what Anat and Moshe realized long ago; that variation is a key to learning. They even noted that the variation has to be very close to what you're already doing, just like Anat calls, "differentiating around the edges." In the end, they even recognize the "strong implications for rehabilitation," something we already make great use of.

What we found is if you practice a slightly modified version of a task you want to master, you actually learn more and faster than if you just keep practicing the exact same thing multiple times in a row.
— Pablo Celnik, Johns Hopkins