It doesn’t matter how slow you go as long as you don’t stopConfucius
Those bar lines can be the most troublesome places for stopping! They often act as a bit of a rest stop (whether consciously or subconsciously!) while the brain figures out what to play next.
We try several strategies in my music studio to help curb this habit. Sometimes I might cover up the music leaving only a bar and a half showing. Students then have to complete this little section without any pausing or stopping.
Removing the bar lines entirely is another option – using tippex or perhaps rewriting a small section of it in music notation software (or by hand – great theory practice!)
Slowing the music right down may help too. If you are playing too fast than you can cope with, there is a bigger likelihood of losing the flow.
A discussion about phrases and ‘musical sentences’ can be useful. Saying a full sentence out loud but deliberately stopping mid way is a good way of reinforcing how odd it can sound. Thinking in ‘phrases not bars’ is a good mantra!
With my flute students we play the ‘phrases game’. We split the music up into phrases using ticks to show the end of each phrase or musical sentence. I play up to the first tick, the student takes over and plays to the next tick and then I take over etc. If the student stops during the phrase they have to play it again!
How do you approach this problem?