I doubt there is a music student in the world who has never uttered the words, “I played it better at home.” As a matter of fact, I resorted to spewing something similar recently when I was practicing a piece just before a student arrived for a lesson.
I was so excited about the progress I had been making that I wanted to share it with them. Somehow, most of the intricate parts I felt I was so close to commanding completely deserted me.
How could that happen???
The short answer to this is mindset or mental frame. This entry in our Inside The Mind... series addresses some of the reasons this happens, as well as offers some thoughts on getting past the issue.