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. 2020 Dec 14;32(1):3–13. doi: 10.1177/0956797620959014

Fig. 1.

Fig. 1.

Mean residual score for musical aptitude and musical achievement in the musician sample (a) and twin sample (b) adjusted for age and sex and for age, sex, and total practice. For each analysis, results are shown separately for individuals who started musical training before the age of 8 years and at 8 years or later. Asterisks indicate significant differences between age groups (p < .01). Error bars indicate confidence intervals.