Table 2.

Results from the neuropsychological test battery. Χ² refers to statistical evidence from the Kruskal Wallis test.

Variable	ε2+		ε33		ε4+		Statistical evidence (ANOVA or Kruskal Wallis)
	Mean	SD	Mean	SD	Mean	SD
Digits forwards	6.061	1.029	5.925	1.185	5.907	1.25	p = 0.835
							Effect size = 0.003
Digits backwards	4.576	1.437	4.3	1.381	4.186	1.367	p = 0.496
							Effect size = 0.013
RAVLT trials I-V recall (errors)	1.636	2.133	1.425	2.024	1.419	1.918	Χ2 = 1.205
							p = 0.547
RAVLT trials I-V recall (repetitions)	15.424	12.281	9.05	10.583	13.791	15.239	Χ2 = 4.650
							p = 0.098
RAVLT trials I-V recall (total)	57.848	7.484	52.7	10.118	53.884	7.582	Χ2 = 6.663
							p = 0.036*
RAVLT trial VII delayed recall (errors)	11.969	2.901	10.75	3.095	11.214	2.968	Χ2 = 0.523
							p = 0.770
RAVLT trial VII delayed recall (total)	11.969	2.901	10.75	3.095	11.214	2.968	Χ2 = 2.980
							p = 0.225
Verbal fluency (FAS) total no. words	43.697	8.432	41.25	11.047	41.186	11.065	p = 0.567
							Effect size = 0.010
Category fluency (animals)	23.636	3.959	21.85	5.323	23.093	4.83	p = 0.355
							Effect size = 0.018
Paired associative learning (errors)	1.667	1.931	1.725	1.961	2.465	2.693	Χ2 = 2.907
							p = 0.234
Paired associative learning (total)	51.242	7.08	45.7	13.921	46.651	9.768	Χ2 = 4.722
							p = 0.094
Rey-Osterrieth figure delayed recall	22.788	4.697	20.075	7.604	21.093	6.045	p = 0.317
							Effect size = 0.029
Rey-Osterrieth figure immediate recall	23.561	5.275	19.738	8.252	21.244	6.073	p = 0.104
							Effect size = 0.040
Trails B – Trails A (secs)	20.595	9.636	36.745	41.301	33.835	23.521	Χ2 = 11.704
							p = 0.003*
Episodic list learning total recalled	11.697	2.687	10.075	3.214	10	3.471	Χ2 = 6.842
							p = 0.033*
Episodic list learning errors	0.424	0.792	0.475	0.816	0.31	0.643	Χ2 = 0.781
							p = 0.677
C-mean simple reaction time (ms)	292.049	38.829	284.925	34.884	289.379	29.281	Χ2 = 0.839
							p = 0.657
C-mean choice reaction time (ms)	438.109	59.592	440.356	60.409	446.225	53.149	p = 0.778
							Effect size = 0.004
Choice RT error rate	0.036	0.021	0.041	0.029	0.047	0.042	Χ2 = 1.990
							p = 0.370
Stroop interference effect (ms)	91.878	95.07	124.454	94.421	109.775	84.805	p = 0.324
							Effect size = 0.020