Table 4.
Spontaneous activity in the object recognition arena.
| Factor | EV | % σ2 | Behaviours | FL | Factorial scoresa | Pb |
|---|---|---|---|---|---|---|
| 1. Risk-assessment | 6.483 | 43.219 | Rearing, trial (f) | 0.913 | CON: 0.146 ± 0.353 CUS: −0.146 ± 0.286 | 0.529 |
| Rearing, habituation (f) | 0.896 | |||||
| Grooming, trial (s) | −0.889 | |||||
| Rearing, habituation (s) | 0.875 | |||||
| Rearing, trial (s) | 0.868 | |||||
| Grooming, trial (f) | −0.703 | |||||
| 2. Ambulatory activity | 2.124 | 14.157 | Distance travelled, trial (m) | 0.808 | CON: −0.625 ± 0.206 CUS: 0.625 ± 0.286 | 0.002 |
| Distance travelled, test (m) | 0.808 | |||||
| Distance travelled, habituation (m) | 0.710 |
EV: Eigenvalue. FL: Factorial loads. % σ2: percentage of explained variance. (s): Seconds. (f): Frequency. (m): meters. Kaiser Meyer Olkin = 0.581. Bartlett’s Sphericity test, χ2(105) = 263.793, p = 0.0001. 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).