Table 2.
Overview of importance of variables from the selected models explaining judgement bias among young female domestic fowl. The sum of AICω (ΣAICω) for variables occurring in supported models (Table 2, obtained from models with accumulative weight 0.95). ΣAICω close to 1 show variables that are included in all of the supported models and, conversely, towards 0 if the variables appear in few supported models.
| Model | ΣAICω |
|---|---|
| i) Influence of cold stress, environmental complexity, and norepinephrine | |
| EC | 1.00 |
| Tel_NE | 0.20 |
| Ot_NE | 0.19 |
| Cue | 0.17 |
| (ii) Influence of cold stress, environmental complexity, and dopamine | |
| EC | 1.00 |
| Ht_DA | 0.27 |
| Cue | 0.21 |
| (iii) Influence of serotonin | |
| EC | 1.00 |
| Ht_5-HT | 0.24 |
| Cue | 0.22 |
| (iv) Influence of cold stress, environmental complexity, and dopamine turnover rate | |
| EC | 1.00 |
| Mes_DOPAC/DA | 0.80 |
| Ot_DOPAC/DA | 0.22 |
| Cue | 0.17 |
| (v) Influence of cold stress, environmental complexity, and serotonin turnover rate | |
| EC | 1.00 |
| Tel_5-HIAA/5-HT | 0.21 |
| Ht_5-HIAA/5-HT | 0.21 |
| Cue | 0.17 |
CS – Cold stress, EC – Environmental complexity, Cue – Colour cues, NE – Norepinephrine, DA – Dopamine, 5-HT – Serotonin, DOPAC/DA – Dopamine turnover rate, 5-HIAA/5-HT – Serotonin turnover rate, Ht – Hypothalamus/thalamus, Tel – Telencephalon, Mes – Mesencephalon, Ot – Optic tectum.