Table 3.

Results of repeatability analyses showing R values calculated for each personality trait and for spatial recognition per experimental group (juveniles and adults)

Experimental group	Trait	Fixed effects in LMM	LMM without litter effect				LMM with random litter effect
			N	R ± SE	95% CI	p	R ± SE	95% CI	p
Juveniles (week 6 vs. 7)	Activity OF	Trial number + test date	83/38	0.54 ± 0.10	[0.35, 0.73]	<0.001	0.45 ± 0.13	[0.20, 0.70]	<0.001
	Boldness	Trial number	83/38	0.57 ± 0.11	[0.32, 0.73]	<0.001	0.27 ± 0.13	[0, 0.53]	0.038
	Activity YM	Trial number	81/39	0.16 ± 0.14	[0, 0.47]	<0.001	0.05 ± 0.11	[0, 0.37]	0.359
	Exploration	Observer	77/39	0.40 ± 0.12	[0.19, 0.66]	<0.001	0.39 ± 0.14	[0.17, 0.56]	0.004
	Spatial recognition		81/39	0.00	NA	NA	0.00	NA	NA
Adults (week 12 vs. 24)	Activity OF	Trial number + sex + housing condition	52/31	0.49 ± 0.13	[0.21, 0.72]	<0.001	0.49 ± 0.17	[0.01, 0.69]	0.006
	Boldness	Sex	52/31	0.20 ± 0.16	[0, 0.53]	<0.001	0.20 ± 0.15	[0, 0.49]	0.161
	Activity YM		51/31	0.69 ± 0.09	[0.49, 0.82]	<0.001	0.11 ± 0.10	[0, 0.34]	0.101
	Exploration		52/31	0.18 ± 0.15	[0, 0.49]	0.006	0.00 ± 0.11	[0, 0.36]	1.000
	Spatial recognition		51/31	0.20 ± 0.15	[0, 0.53]	0.004	0.00	NA	NA

Sample sizes are given: first trial/ second trial. Italic p values were significant after Bonferroni correction (p < 0.013). NA indicates that the model did not converge because of too small/negative value of R

OF Open Field test, YM Y Maze test