We all get stuck on problem passages from time to time. And it can be very natural to simply throw more repetitions at it, in hopes that this will eventually unlock something. But in doing so, we end up accumulating more and more incorrect repetitions and reinforcing mistakes. So what’s the alternative? A new study took a rare, close-up, repetition by repetition look at how artist-level musicians practice difficult passages. And it identified some key similarities in how they approach problem...