Table 2.

Correlations Among Musical Aptitude, Musical Achievement, Age of Onset of Musical Training, Age, and Total Practice for the Musician and Twin Samples

Sample and variable	Musical aptitude	Musical achievement	Age of onset	Age
Musician sample
Musical achievement	.08
Age of onset	−.18	−.11
Age	.04	.28	.04
Total practice	.05	.44	−.12	.79
Twin sample
Musical achievement	.40
Age of onset	−.12	−.17
Age	−.08	−.04	−.01
Total practice	.30	.61	−.26	.19