Table 7.
Main behavioural domains across tests.
| Factor | EV | % σ2 | Behaviours | FL | Factorial scoresa | Pb |
|---|---|---|---|---|---|---|
| 1. Hyper-responsivity to novelty and mild threats | 2.688 | 44.805 | ORT Object exploration | 0.894 | CON: −0.558 ± 0.211 CUS: 0.558 ± 0.311 | 0.008 |
| OFT Ambulatory activity | 0.878 | |||||
| ORT Ambulatory activity | 0.852 | |||||
| 2. Anxiety/depressive-like response | 1.183 | 19.722 | EPM Anxiolytic-like response | −0.811 | CON: −0.607 ± 0.166 CUS: 0.607 ± 0.320 | 0.003 |
| FST Stress-coping response | −0.642 | |||||
| SPT Reward sensitivity | 0.565 |
EV: Eigenvalue. FL: Factorial loads. % σ2: percentage of explained variance. Kaiser Meyer Olkin = 0.630. Bartlett’s Sphericity test, χ2(15) = 33.617, p = 0.004. aFactor scores are the mean of standardised regression coefficients ± their error standard of the mean. bStatistical significance corresponds to an analysis of variance comparing the factorial scores between control (CON) and stress (CUS) groups (see main text for details).