Summary: Zebra finches use a variation of reward prediction error to evaluate how well they learn a song.
Rumor has it that the great pianist Arthur Rubinstein was taking a walk in New York City one day when a pedestrian approached him and asked, “How do I get to Carnegie Hall?” Rubinstein pondered this question for a moment and replied, “Practice!” Indeed, many of our motor skills, whether playing tennis or playing the piano, are not innately programmed but acquired through a process of trial and error.