Demographic characteristics of the samples
| Professional musicians (n = 20) | Amateur musicians (n = 20) | Non-musicians (n = 40) | |
|---|---|---|---|
| Age (year) | 23.05 (3.83) | 25.95 (5.61) | 26.92 (4.90) |
| Verbal IQ | 119.23 (7.06) | 122.57 (2.57) | 118.18 (5.08) |
| Age of commencement (year) | 6.00 (1.81) | 7.65 (4.17) | |
| Average practice time per day (hr) | 2.23 (0.91)* | 1.15 (1.0)* | |
| Average practice time per day × duration of practice (hr × year) | 39.1 (21.24)* | 17.88 (9.74)* |
Data are mean (SD).
↵* p < 0.001.