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. 2013 Dec 23;50(4):1233–1240. doi: 10.1037/a0035388

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© 2013 the Author(s)

This article has been published under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Copyright for this article is retained by the author(s). Author(s) grant(s) the American Psychological Association the exclusive right to publish the article and identify itself as the original publisher.

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Common pathway model: a_l, c_l, and e_l represent additive genetic (A), shared environment (C) and nonshared environmental (E) components of the latent factor variance across the three ages; paths f₉, f₁₂, and f₁₄ are the factor loadings from measures at each age; a_s, c_s, and e_s are the specific additive genetic, shared environmental, and nonshared environmental influences on scales at each age.