Table 1.

Performance on the Cogitat holeboard of the DSP4 and saline groups for each week (mean ± standard error)

	Control	DSP4_10 mg	DSP4_20 mg	DSP4_50 mg
Reference memory error
Week 1	16.71 ± 2.49	16.15 ± 2.14	14.61 ± 2.64	14.28 ± 1.82
Week 2	12.64 ± 1.27	14.35 ± 1.25	11.71 ± 1.87b	12.74 ± 2.44
Week 3	18.03 ± 2.4	15.28 ± 1.93	14.02 ± 1.66	16.95 ± 1.94
Week 4	12.45 ± 1.82	8.43 ± 1.691	7.73 ± 1.19a1	8.63 ± 1.51
Week 5	6.80 ± 1.351	4.20 ± 1.151	4.09 ± 1.221	4.71 ± 1.221
Working memory error
Week 1	11.84 ± 1.06	10.58 ± 2.01	12.54 ± 0.93	14.52 ± 1.2a
Week 2	10.14 ± 1.48	7.60 ± 0.93	8.04 ± 1.241	9.41 ± 1.881
Week 3	7.04 ± 1.271	7.79 ± 0.94	7.12 ± 1.491	7.76 ± 0.741
Week 4	6.32 ± 1.021	7.47 ± 2.1	7.07 ± 1.481	6.15 ± 1.251
Week 5	7.11 ± 1.081	6.69 ± 1.561	4.49 ± 1.011	5.49 ± 1.321

^aCompared with control group, ^b compared with DSP4_10 mg/kg, ¹ compared with week 1, ^{a, b, 1}: p ≤ 0.05