Revisiting the association between music lessons and intelligence: Training effects or music aptitude?

- Correlational data are often interpreted as showing that music training causes improvements in nonmusical abilities.
- We examined the association between music training and intelligence, with a focus on the role played by music aptitude.
- Music training was associated with intelligence, but this association disappeared when music aptitude was held constant.
- Music aptitude was associated with intelligence even when music training was held constant.
- High levels of intelligence and music aptitude predict who takes music lessons.

We examined whether the link between intelligence and musical expertise is better explained by formal music lessons or music aptitude. Musically trained and untrained adults completed tests of nonverbal intelligence (Raven's Advanced Progressive Matrices) and music aptitude (Musical Ear Test). They also provided information about their history of music lessons and socioeconomic status (SES). Duration of music training was associated positively with SES (mother's education), nonverbal intelligence, melody aptitude, and rhythm aptitude. Intelligence and music aptitude were also positively associated. The association between music training and intelligence remained evident after controlling for SES, but it disappeared after controlling for music aptitude. By contrast, music aptitude had a strong correlation with intelligence even after accounting for music training and SES. Thus, the association between music training and intelligence may arise because high-functioning individuals are more likely than other individuals to have good aptitude for music and to take music lessons.