Fig. 2. AE biometric common factor model, in which the paths represent the percentage of variance of the BDI, Ho scale, and ISEL explained by common latent factors and factors specific to each of the measures. No significant shared environmental or genetic dominance factors were significant. Significance indicates a significant increase in model ² value if the parameter is omitted compared with the full AE model. *p < .005, **p < .001.

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