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.
^aNon-parametric estimate of effect size. Animal facility rearing (AFR) versus maternal separation (MS). Ranges from −1 (AFR<MS) to +1 (AFR>MS).

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