Table 1.
Descriptive statistics.
| Males | Females | |||||
|---|---|---|---|---|---|---|
| N | Range | M (SD) | N | Range | M (SD) | |
| Musical expertise 1 | ||||||
| - Pitch | 2712 | 1–27 | 18.7 (5.1) | 3759 | 1–27 | 17.8 (4.6) |
| - Melody | 2712 | 0–18 | 6.8 (3.0) | 3759 | 0–17 | 6.6 (2.8) |
| - Rhythm | 2712 | 4–18 | 15.4 (2.2) | 3759 | 5–18 | 15.3 (2.2) |
| Lifetime music practice 2 | 2712 | 0–23,920 | 2380 (3699) | 3759 | 0–22,776 | 2734 (3651) |
| Lifetime music practice (in participants that had played an instrument or had actively sung) 3 | 1665 | 52–23,920 | 3876 (4061) | 2973 | 52–22,776 | 3457 (3789) |
M = mean; SD = standard deviation. 1 The musical expertise variable is the mean of the standardised scale scores of the rhythm, melody, and pitch music discrimination tests; descriptives are provided for the sub-tests. 2 Note that these are estimates based on range categories of weekly practice hours. 3 The sample used in the supplementary analyses with only playing twins.