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. Author manuscript; available in PMC: 2015 Feb 19.
Published in final edited form as: Intelligence. 2014 Feb 19;43:65–76. doi: 10.1016/j.intell.2014.01.008

Figure 2. Hypothetical phenotypic factor model and corresponding genetically informative factor models.

Figure 2

A = Additive genetic influences. E = Unique environmental influences. In order to simplify the figure, common environmental influences (C) are not presented. Parameters with a subscript notation represent variable specific genetic and environmental influences.