Ulrich Neisser apparently. He's also quoted by this guy who apparently had the same idea as me: https://www.modacity.co/blog/using-repetition-achieve-effective-

Ulrich Neisser apparently. He's also quoted by this guy who apparently had the same idea as me: https://www.modacity.co/blog/using-repetition-achieve-effective-practice/ https://www.modacity.co/blog/using-repetition-achieve-effect...