Table 3.
Estimated (co)variance components (standard error) associated with random effects in mixed models of EGPi and log-transformed PDi
| log(PD i) | EGP i | |||||||
|---|---|---|---|---|---|---|---|---|
| Variance (SE) | df | χ21 | P | Variance (SE) | χ21 | df | P | |
| V year | 0.02 (0.02) | 1 | 3.22 | 0.07 | 0.02 (0.03) | 2.83 | 1 | 0.09 |
| V M † | 0.26 (0.05) | 1 | 40.29 | <0.001 | 0.26 (0.06) | 40.61 | 1 | <0.001 |
| V P † | 0.31 (0.06) | 1 | 35.82 | <0.001 | 0.31 (0.06) | 35.34 | 1 | <0.001 |
| V MSG ‡ | 0.39 (0.15) | 2 | 58.16 | <0.001 | 0.34 (0.13) | 55.00 | 2 | <0.001 |
| V PSG ‡ | 0.59 (0.21) | 2 | 64.54 | <0.001 | 0.54 (0.19) | 62.91 | 2 | <0.001 |
| COV MSG,PSG | −0.48 (0.17) | 1 | 39.33 | <0.001 | −0.43 (0.15) | 36.84 | 1 | <0.001 |
| V R | 0.32 (0.04) | - | - | - | 0.32 (0.04) | - | - | - |
Statistical inference of random effects is by likelihood ratio test results (see main text for details). M and P denote maternal and paternal individuals, while MSG and PSG denote the corresponding maternal and paternal social groups. P-values in bold denote significance at alpha 0.05.
†Not significantly different from each other (logLRT, PDi: χ2 = 0.38, P = 0.5 EGPi: χ2 = 0.28, P = 0.6).
‡Not significantly different from each other (logLRT, PDi: χ2 = 3.43, P = 0.06, EGPi: χ2 = 3.68, P = 0.06).