Table 3.
Model | −2LL | AIC | BIC | Δχ2 | Δdf | p | RMSEA | Compared with model no. |
---|---|---|---|---|---|---|---|---|
Wave 1 | ||||||||
1. Saturated model | 3,087.93 | 795.93 | −2,117.64 | |||||
2. ACE (males ≠ females) | 3,095.69 | 785.69 | −2,142.52 | 7.76 | 9 | .55 | <0.01 | 1 |
2a. ACE (males = females) | 3,097.64 | 781.64 | −2,151.13 | 1.95 | 3 | .58 | <0.01 | 2 |
3. AE (males = females) Drop C | 3,097.75 | 779.75 | −2,154.27 | 0.11 | 1 | .71 | <0.01 | 2a |
3a. CE (males = females) Drop A | 3,099.68 | 781.69 | −2,153.30 | 2.04 | 1 | .20 | <0.01 | 2a |
3b. E only (males = females) Drop A, C | 3,123.61 | 803.61 | −2,144.53 | 25.97 | 2 | <.01 | 0.052 | 2a |
A = (−0.51)2 = 0.27; 95% CI [.17, .37] | ||||||||
E = (−0.85)2 = 0.73; 95% CI [.63, .83] | ||||||||
| ||||||||
Wave 2 | ||||||||
1. Saturated model | 939.50 | 239.50 | −445.69 | |||||
2. ACE (males ≠ females) | 950.57 | 232.57 | −463.70 | 11.06 | 9 | .27 | 0.036 | 1 |
2a. ACE (males = females) | 952.52 | 228.52 | −470.57 | 1.95 | 3 | .58 | 0.022 | 2 |
3. AE (males = females) Drop C | 952.52 | 226.52 | −473.19 | 0 | 1 | .99 | <0.01 | 2a |
3a. CE (males = females) Drop A | 958.48 | 232.48 | −470.21 | 5.96 | 1 | .04 | 0.05 | 2a |
3b. E only (males = females) Drop A, C | 970.05 | 242.05 | −467.03 | 17.53 | 2 | <.01 | 0.08 | 2a |
A = (−0.64)2 = 0.41; 95% CI [.23, .56] | ||||||||
E = (−0.76)2 = 0.59, 95% CI [.44, .77] | ||||||||
| ||||||||
Wave 3 | ||||||||
1. Saturated model | 2,383.85 | 657.85 | −1,446.13 | |||||
2. ACE (males ≠ females) | 2,391.96 | 647.96 | −1,469.58 | 8.11 | 9 | .52 | <0.01 | 1 |
2a. ACE (males = females) | 2,394.04 | 644.04 | −1,477.71 | 2.08 | 3 | .55 | <0.01 | 2 |
3. AE (males = females) Drop C | 2,394.04 | 642.042 | −1,480.77 | 0 | 1 | .99 | <0.01 | 2a |
3a. CE (males = females) Drop A | 2,397.30 | 645.30 | −1,479.14 | 3.26 | 1 | .07 | 0.01 | 2a |
3b. E only (males = females) Drop A, C | 2,405.21 | 651.21 | −1,478.25 | 11.17 | 2 | <.01 | 0.035 | 2a |
A = (−0.45)2 = 0.22, 95% CI [.09, .34] | ||||||||
E = (−0.86)2 = 0.78, 95% CI [.66, .91] | ||||||||
| ||||||||
Wave 4 | ||||||||
1. Saturated model | 1,244.74 | 354.74 | −593.33 | |||||
2. ACE (males ≠ females) | 1,251.84 | 343.836 | −614.37 | 7.096 | 9 | .63 | <0.01 | 1 |
2a. ACE (males = females) | 1,258.708 | 644.04 | −619.131 | 6.87 | 3 | .08 | 0.03 | 2 |
3. AE (males = females) Drop C | 1,258.708 | 342.708 | −621.86 | 0 | 1 | .99 | 0.02 | 2a |
3a. CE (males = females) Drop A | 1,260.66 | 344.66 | −620.88 | 1.95 | 1 | .40 | 0.03 | 2a |
3b. E only (males = females) Drop A, C | 1,270.139 | 352.139 | −618.880 | 11.43 | 2 | <.01 | 0.06 | 2a |
A = (−0.50)2 = 0.28, 95% CI [0.12, 0.42] | ||||||||
E = (−0.81)2 = 0.72, 95% CI [0.58, 0.88] |
Note. Univariate models were run on transformed data. −2LL = −2(log-likelihood); AIC = Akaike’s information criterion; BIC = Bayesian information criterion; χ2 = difference in log-likelihoods between nested models; Δdf = change in degrees of freedom; RMSEA = root-mean-square error of approximation; A = additive genetic influences; C = shared environmental influences; E = nonshared environmental influences. Best-fitting models and parameter estimates are indicated in bold.