Figure 1.
Different models applied to the data.
(A) Cholesky decomposition. (B) Independent pathway model with two common genetic factors. (C) Independent pathway model with one common genetic factor. A = additive genetic influences. Subscripts c and s denote common and specific influences, respectively. Genetic factors of the Cholesky decomposition are labelled A1, A2, A3, and A4.
Table 1.
Descriptive statistics.
Table 2.
Phenotypic correlations (top) for females (below diagonal) and males (above diagonal) and twin correlations for each zygosity (bottom) for WMT, Rhythm, Pitch, and Melody corrected for sex and age.
Figure 2.
The reduced AE independent pathway model with two common genetic factors.
Numbers represent path coefficients with confidence intervals within parentheses. Significant pathways are shown with solid lines; non-significant pathways are represented as dashed lines. A = additive genetic influences; E = non-shared environmental influences. Subscripts c and s denote common and specific influences, respectively.
Table 3.
Multivariate model fitting results for the three music aptitude measures (Pitch, Rhythm, and Melody) and WMT (last) corrected for age and sex with the best fitting models highlighted in bold.