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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Behav Genet. 2015 Dec 12;46(4):492–505. doi: 10.1007/s10519-015-9772-0

Figure 1.

Figure 1

Depiction of the parameter estimated in the full AE STPI simplex model. A = additive genetic effects; E = unique environmental effects; STPI = STPI for each age bucket; single headed arrows=path coefficients; double headed arrow = variance components. λ is constrained to 1.0.