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. Author manuscript; available in PMC: 2011 Mar 30.
Published in final edited form as: Twin Res Hum Genet. 2011 Feb;14(1):53–63. doi: 10.1375/twin.14.1.53

Figure 1. Common pathway model for men and women.

Figure 1

Boxes represent measured traits. Circles represent latent (unobserved) factors that influence the measured traits. A, C and E represent influences through the common factor; spA, spC and spE represent influences specific to each of the three measured traits. Arrows represent standardized paths, which are squared to indicate the magnitude (variance) of the relevant factors shown in table 4.