Table 4. Twin Model Fit Statistics: Full Models.
| Model | −2LL | df | Parameters | BIC | Δχ2 | Δdf | p | AIC |
|---|---|---|---|---|---|---|---|---|
| Note. Cor Fac = correlated factors solution; A = additive genetic influence; D = nonadditive genetic influence; C = shared environmental influence; E = nonshared environmental influence; −2LL = fit statistic; df = degrees of freedom; Δχ2 = change in −2LL between two models, which is χ2 distributed; BIC = Bayesian information criteria; AIC = Akaike’s information criteria. | ||||||||
| * Indicates best-fitting full model; all models fitted to three Specific PLEs Questionnaire subscales (Paranoia, Hallucinations, and Cognitive Disorganization) and the two sleep measures. | ||||||||
| Estimates equated across sexes | ||||||||
| Saturated | 74286.91 | 29,551 | 130 | −165,036.08 | ||||
| ACE Cor Fac* | 74395.64 | 29,631 | 50 | −165,575.25 | 108.73 | 80 | .02 | −51.27 |
| ADE Cor Fac | 74406.63 | 29,631 | 50 | −165,564.26 | 119.72 | 80 | <.001 | −40.28 |
| Quantitative sex limitation | ||||||||
| Saturated | 74093.25 | 29,421 | 260 | −164,176.92 | ||||
| ACE Cor Fac | 74265.12 | 29,581 | 100 | −165,300.83 | 171.87 | 160 | .25 | −148.13 |
| ADE Cor Fac | 74282.79 | 29,581 | 100 | −165,283.16 | 189.54 | 160 | .06 | −130.46 |