Table 4.

Performance scores across delays and lists at 2 years of age

Group/case	10s	30s	60s	120s	LL3	LL5	LL10	Average
N
N-1a	92	98	98	91	97	91	83	93
N-2a	95	93	94	91	79	79	63	85
N-3a	100	95	94	93	97	98	67	92
N-4a	94	95	97	92	94	84	86	92
N-5	90	88	91	92	93	85	79	88
N-6	88	90	90	89	89	76	67	84
M	93	93	94	91	92	86	74	89
IC
Neo-IC-1a	94	95	95	95	99	91	88	94
Neo-IC-2a	95	95	93	95	95	91	81	92
Neo-IC-3a	83	86	86	79	84	77	56	79
Neo-IC-4a	88	87	89	84	83	79	67	82
M	90	91	91	88	90	85	73	87
ICO
Neo-ICO-1	91	88	76	88	77	68	65	79
Neo-ICO-2	82	85	81	75	70	65	58	74
Neo-ICO-3	84	84	83	83	71	64	87	79
Neo-ICO-4	93	83	88	82	80	79	79	84
M	88	85	82	82	75	69	65	79
O
Neo-O-1	88	95	93	89	92	73	67	85
Neo-O-2	90	88	83	81	76	57	59	76
Neo-O-3	84	83	80	85	75	69	52	75
M	87	89	85	85	81	66	59	79

Note: Scores are percent correct choices over 100 trials at each delay and over 150 trials at each list of the DNMS performance test. Percentage correct represents the average score across the 4 delays and 3 lists. M, mean; numbers in italics represent mean values for each group.

^aAnimals that were already reported in Málková et al. (2000). Note that Case O-4 was not tested at 2 years of age.