Table 3.

Summary of the 42 test items of the new VSL task (data from first administration of the task only). The left section of the table depicts the targets and foils (each shape is represented by a number from 1 to 16), and the various properties of each item (items examining knowledge of pairs/triplets; number of options in question; TP of target; mean TP of foils; degree of position violations). The right section of the table shows the discrimination index, as well as the performance rate (percent of participants correct on each item).

Item No.	Target	Foil(s)	Triplet/pair	#options (chance)	TP target	mean TP foils	position violations	d index (item by total minus item correlation)	item performance (% of participants correct)
	“Pattern recognition” items
1	1 2 3	2 13 8	triplet	2 (0.5)	0.33	0.00	0.67	0.40	0.66
2	2 1 4	1 2 4	triplet	2 (0.5)	0.33	0.19	0.00	0.22	0.39
3	4 3 1	4 3 9	triplet	2 (0.5)	0.33	0.17	0.00	0.26	0.77
4	3 4 2	7 1 3	triplet	2 (0.5)	0.33	0.09	0.33	0.25	0.77
5	5 6 7	9 5 11	triplet	2 (0.5)	1	0.00	1.00	0.49	0.68
6	8 9 10	16 11 6	triplet	2 (0.5)	1	0.07	1.00	0.43	0.73
7	11 12 13	14 6 10	triplet	2 (0.5)	1	0.00	0.00	0.35	0.77
8	14 15 16	3 1 15	triplet	2 (0.5)	1	0.17	0.67	0.37	0.73
9	1 2 3	15 1 4	triplet	2 (0.5)	0.33	0.02	0.33	0.35	0.63
10	2 1 4	14 6 10	triplet	2 (0.5)	0.33	0.00	0.00	0.46	0.68
11	4 3 1	2 8 4	triplet	2 (0.5)	0.33	0.00	0.33	0.44	0.63
12	3 4 2	16 11 6	triplet	2 (0.5)	0.33	0.07	1.00	0.16	0.81
13	5 6 7	14 3 2	triplet	2 (0.5)	1	0.02	0.00	0.34	0.76
14	8 9 10	5 12 13	triplet	2 (0.5)	1	0.50	0.00	0.31	0.63
15	11 12 13	1 2 4	triplet	2 (0.5)	1	0.19	0.00	0.14	0.63
16	14 15 16	16 7 10	triplet	2 (0.5)	1	0.00	0.67	0.42	0.73
17	1 2 3	9 5 11 2 8 4 14 3 2	triplet	4 (0.25)	0.33	0.01	0.44	0.19	0.53
18	2 1 4	9 5 11 16 11 6 1 2 4	triplet	4 (0.25)	0.33	0.09	0.67	0.37	0.34
19	4 3 1	16 7 10 2 13 8 2 8 4	triplet	4 (0.25)	0.33	0.00	0.56	0.45	0.56
20	3 4 2	5 12 13 15 1 4 3 1 15	triplet	4 (0.25)	0.33	0.28	0.22	0.23	0.47
21	5 6 7	16 7 10 14 6 10 2 13 8	triplet	4 (0.25)	1	0.00	0.44	0.51	0.52
22	8 9 10	1 2 4 4 3 9 15 1 4	triplet	4 (0.25)	1	0.18	0.11	0.27	0.53
23	11 12 13	14 3 2 7 1 3 3 1 15	triplet	4 (0.25)	1	0.09	0.22	0.48	0.53
24	14 15 16	5 12 13 4 3 9 7 1 3	triplet	4 (0.25)	1	0.25	0.22	0.55	0.50
25	2 3	1 16	pair	2 (0. 5)	0.33	0.00	0.00	0.28	0.73
26	1 4	2 4	pair	2 (0. 5)	0.33	0.04	0.00	0.19	0.50
27	3 1	6 3	pair	2 (0. 5)	0.33	0.00	0.00	0.52	0.68
28	4 2	13 2	pair	2 (0. 5)	0.33	0.14	0.00	0.14	0.74
29	6 7	5 11	pair	2 (0. 5)	1	0.00	0.50	0.55	0.68
30	8 9	3 14	pair	2 (0. 5)	1	0.04	0.00	0.24	0.76
31	12 13	6 11 12 15 9 4	pair	4 (0.25)	1	0.00	0.33	0.52	0.56
32	14 15	8 10 1 8 15 7	pair	4 (0.25)	1	0.01	0.17	0.57	0.47
33	1 2	7 1 3 14 13 5	pair	4 (0.25)	0.33	0.11	0.33	0.44	0.52
34	4 3	9 2 10 4 16 12	pair	4 (0.25)	0.33	0.05	0.17	0.37	0.61
35	1 (?) 3	2; 13; 9	triplet	3 (0.33)	0.33	0.04	0.17	0.37	0.68
36	2 1 (?)	4; 6 16	triplet	3 (0.33)	0.33	0.00	0.00	0.35	0.71
37	(?) 6 7	5; 14; 3	triplet	3 (0.33)	1	0.00	0.00	0.38	0.63
38	8 (?) 10	9; 15; 4	triplet	3 (0.33)	1	0.00	0.17	0.39	0.68
39	11 (?)	12; 7; 1	pair	3 (0.33)	1	0.00	0.00	0.32	0.69
40	(?) 15	14; 8; 12	pair	3 (0.33)	1	0.00	0.00	0.36	0.63
41	3 (?)	1; 2; 5	pair	3 (0.33)	0.33	0.04	0.25	0.21	0.48
42	(?) 4	3; 11; 10	pair	3 (0.33)	0.33	0.07	0.25	0.60	0.65