Can confirm this is widely known within music pedagogy.<p>However, quite a few of my peers thought it was &quot;stupid&quot; and just practiced the same piece over and over, at the same tempo, without ever stopping and working on the hard parts.<p>After several years of music, there was a pronounced difference between those who practiced effectively and those who merely repeated their mistakes.<p>Perhaps a study like this could convince future students that it&#x27;s worthwhile.