Sex differences in the means and variances of these log-transformed variables were examined in a series of three models of CD and AAB, separately. In the first set of models, the means and variances for CD and AAB were constrained to be equal across sex (CD: χ2 (23) = 1516.47; AAB: χ2 (23) = 811.80). Next, the variances for CD and AAB were freely estimated for each sex, which resulted in a significant improvement in model fit for both CD and AAB (CD: Δχ2 (1) = 510.21, p < .05; AAB: Δχ2 (1) = 237.36, p < .05). In the third and final set of models, both the means and the variances for CD and AAB were freely estimated for each sex, and this model also resulted in a significant improvement in model fit (CD: Δχ2 (2) = 1165.40, p < .05; AAB: Δχ2 (2) = 642.58, p < .05), indicating that the means and variances for CD and AAB were larger for males than females. Thus, in all sex-limited biometric models, the means and variances for CD and AAB
