Table 1. Results of the LMM model to test the effect of LPS neonatal imitation category, infant sex, rearing condition, and the interaction between LPS neonatal imitation category and sex on social behaviours at one year of age, namely rates of aggression given, play and grooming time.
| Independent | Predictor | Estimate | SE | t-value | P |
|---|---|---|---|---|---|
| Play | Intercept | 3.216 | 0.250 | 12.880 | |
| LPS imitation | 0.302 | 0.201 | 1.499 | 0.127 | |
| Sex | −0.952 | 0.204 | −4.665 | <0.001 | |
| rearing | 0.272 | 0.203 | −1.340 | 0.173 | |
| Sex * LPS imitation | −0.777 | 0.263 | −2.957 | 0.004 | |
| Grooming | Intercept | 1.993 | 0.285 | 6.992 | |
| LPS imitation | −0.217 | 0.201 | −1.079 | 0.278 | |
| Sex | 0.208 | 0.204 | 1.020 | 0.311 | |
| rearing | −0.118 | 0.203 | −0.579 | 0.552 | |
| Sex * LPS imitation | −0.060 | 0.251 | −0.238 | 0.806 | |
| Aggression given | Intercept | 0.351 | 0.089 | 3.927 | |
| LPS imitation | 0.089 | 0.043 | 2.069 | 0.039 | |
| Sex | −0.063 | 0.044 | −1.436 | 0.150 | |
| rearing | 0.044 | 0.044 | 1.005 | 0.307 | |
| Sex * LPS imitation | 0.047 | 0.055 | 0.853 | 0.387 |
Significant predictors (p < 0.05) are shown in bold.