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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: Behav Genet. 2015 Oct 24;46(2):252–268. doi: 10.1007/s10519-015-9757-z

Figure 6. Likelihood-ratio test Type I error rates, by parameter and model, for Npairs = 1000.

Figure 6

From left to right, bars correspond to normal, lognormal, Lagrangian Poisson, and negative binomial models. Results for lognormal model are for its log-scale, not raw-scale, parameters. Horizontal dashed line marks nominal Type I error rate of 0.05. Vp = phenotypic variance, MZc = monozygotic-twin covariance, DZc = dizygotic-twin covariance, MZr = monozygotic-twin correlation, DZr = dizygotic-twin correlation, Va = additive-genetic variance, Vc = shared-environmental variance, Ve = nonshared environmental variance, h2 = narrow-sense heritability, c2 = shared-environmentality.