Table 1. Tests for normality and effect size.
| End point |
Shapiro−Wilk test |
Cliff's delta statistics
a |
|||
|---|---|---|---|---|---|
| Statistics | df | P | No EE | With EE | |
| Home cage emergence | |||||
| Emergence latency | 0.820 | 49 | >0.001 | −0.597 | 0.052 |
| Elevated plus-maze | |||||
| Percentage open entries | 0.923 | 49 | 0.003 | +0.653 | +0.234 |
| Percentage open time | 0.940 | 49 | 0.015 | +0.833 | +0.000 |
| Number of head dips | 0.955 | 49 | 0.057 | +0.764 | −0.247 |
| BLA dendrites | |||||
| Total dendritic length | 0.975 | 33 | 0.625 | −0.778 | +0.062 |
| Total branch points | 0.921 | 33 | 0.019 | −0.926 | +0.062 |
| BLA spine density | |||||
| Primary dendrites | 0.894 | 30 | 0.006 | −0.750 | +0.031 |
| Secondary dendrites | 0.911 | 30 | 0.016 | −0.833 | +0.375 |
| Prefrontal cortex dendrites | |||||
| Total dendritic length | 0.987 | 30 | 0.965 | +0.400 | −0.238 |
| Total branch points | 0.930 | 30 | 0.048 | −0.200 | −0.079 |
Abbreviations: BLA, basolateral amygdala; EE, environmental enrichment.
a
Non-parametric estimate of effect size. Animal facility rearing (AFR) versus maternal separation (MS). Ranges from −1 (AFR<MS) to +1 (AFR>MS).