"For a pair of identical twins, the twin who practiced music more did not do better on the tests than the twin who practiced less" So this doesn't make sense -

"For a pair of identical twins, the twin who practiced music more did not do better on the tests than the twin who practiced less" So this doesn't make sense - otherwise, why practice at all? And indeed the article goes on to explain that the "music ability test" only tested some things, like ability to read notes. Maybe the scientists need to work on improving their measurement devices first, before making sweeping claims about talent and practice...