Table 2.

Mean difficulty estimates for each of the 14 items of the miniBESTest with standard errors (S.E.) and infit and outfit mean-square statistics (MnSq). The more difficult the item estimate, the less likely it is for any subject to gain a high score. Alongside each item is its number in the original BESTest (see Table 1). The rating scale column shows how the 4 scaling categories were collapsed into 3 categories, e.g. 0012 means that categories 0 and 1 have been collapsed and then the remaining three categories have been re-numbered accordingly.

ITEM	Mean difficulty	S.E.	Infit MnSq	Outfit MnSq	Rating scale
11 a/b - Stand on L/R leg	2.43	0.25	0.90	1.07	0112
18 a/b - Postural Stepping L/R	1.10	0.22	0.84	0.76	0112
23 - Head turns	1.00	0.19	0.91	0.83	0012
17 - Postural Stepping backward	0.93	0.22	0.97	1.08	0112
27 - Timed “Get Up and Go” with dual task	0.77	0.24	1.07	1.08	0112
10 - Rise to toes	0.65	0.20	0.94	1.11	0012
19d - Foam Surface EC	0.54	0.20	1.04	1.12	0112
25 - Obstacles	0.10	0.21	0.75	0.73	0112
16 - Postural Stepping forward	-0.03	0.21	1.14	1.23	0112
20 - Incline EC	-0.64	0.21	1.12	1.00	0112
24 - Pivot turns	-0.85	0.21	0.99	1.32	0112
22 - Change speed	-1.00	0.20	0.89	0.78	0112
9 - Sit to stand	-1.78	0.24	1.30	1.32	0012
19a - Stance EO	-2.51	0.39	1.12	0.66	0012