Table IV:
Model Comparisons for Genetic and Environmental Moderation by Education and Sex
| Model | ep | neg 2LL | df | AIC | diff −2LL | diff df | p |
|---|---|---|---|---|---|---|---|
| Full Model: Mean Effects & ACE Variance Moderation | 64 | 64474.09 | 25716 | 13042 | - | - | - |
| Equate ACE Variance Across Sex | |||||||
| Equate A Variances Across Sex | 61 | 64486.75 | 25719 | 12948 | 12.66 | 3 | 0.005 |
| Equate C Variances Across Sex | 61 | 64481.02 | 25719 | 13043 | 6.93 | 3 | 0.074 |
| Equate E Variances Across Sex | 61 | 64476.13 | 25719 | 13038 | 2.04 | 3 | 0.361 |
| Test ACE Moderation for Education | |||||||
| No A Moderation of Education for Females | 62 | 64476.13 | 25718 | 13040 | 2.04 | 2 | 0.361 |
| No C Moderation of Education for Females | 62 | 64477.31 | 25718 | 13041 | 3.22 | 2 | 0.200 |
| No E Moderation of Education for Females | 62 | 64475.12 | 25718 | 13039 | 1.03 | 2 | 0.598 |
| No A Moderation of Education for Males | 62 | 64474.54 | 25718 | 13039 | 0.45 | 2 | 0.799 |
| No C Moderation of Education for Males | 62 | 64478.07 | 25718 | 13042 | 3.98 | 2 | 0.137 |
| No E Moderation of Education for Males | 62 | 64486.98 | 25718 | 13051 | 12.89 | 2 | 0.002 |
| Equate ACE Moderation of Education Across Sex | |||||||
| Equate A Moderation of Education Across Sex | 62 | 64477.53 | 25718 | 13042 | 3.44 | 2 | 0.179 |
| Equate C Moderation of Education Across Sex | 62 | 64478.08 | 25718 | 13042 | 3.99 | 2 | 0.136 |
| Equate E Moderation of Education Across Sex | 62 | 64484.13 | 25718 | 13048 | 10.04 | 2 | 0.007 |
Note: The model described in the results (and displayed in Figure 2) is listed in bold font, which included moderation effects of age and education on the genetic (A), shared environmental (C), and nonshared environmental (E) influences on semantic fluency separately for each sex, as well as the phenotypic effects of age and education in each sex on the mean (and independent means for each sex). Tests have 2 df because education is allowed to moderate the genetic/environmental paths from education to semantic fluency as well as the unique genetic/environmental influences on semantic fluency.