A great article from the European Guitar Teachers Association. Money quote:
“In a sample, all children selected for entry to a specialist music school had parents who took an active participatory role in music lessons and daily practice. Many parents actually supervised early practice on a moment-to-moment basis. All children in the sample reported periods of low motivation for practice, and claimed that had their parents not pushed them to practice during these periods, they probably would not have done any at all. Most parents provided high levels of material and time resource (e.g. transporting children to distant lessons, rehearsal groups, and concerts).”
Read the whole thing, it’s very enlightening.