Rasch Analysis of a New Hierarchical Scoring System for Evaluating Hand Function on the Motor Assessment Scale for Stroke

Table 1

Behavioral criteria statistics for hand movements item.

	Dimensionality				Item difficulty
	Infit MnSq	ZStd	Outfit MnSq	ZStd	Measure (standard error)
Finger intrinsic against gravity	0.77	−2.50	9.90	9.90	6.53 (0.21)
Timed thumb opposition	1.43	4.10	1.58	1.50	5.90 (0.19)
Finger intrinsic gravity elim.	0.61	−4.60	9.90	9.90	5.30 (0.19)
Wrist radial dev. against gravity	1.23	1.70	1.94	2.00	1.83 (0.21)
Wrist radial dev. gravity elim.	1.09	0.60	0.49	−1.10	0.04 (0.24)
Wrist extension against gravity	0.79	−1.50	0.37	−1.50	−0.83 (0.25)
Finger extension gravity elim.	0.78	−1.60	0.24	−2.10	−1.02 (0.26)
Finger extension against gravity	0.81	−1.30	0.25	−2.10	−1.05 (0.26)
Wrist extension gravity elim.	0.74	−2.00	0.27	−2.00	−1.22 (0.26)
Forearm supination	0.99	0.00	0.31	−1.80	−1.50 (0.26)
Any thumb motion	1.16	1.00	0.68	−0.50	−2.80 (0.30)
Forearm pronation	1.11	0.60	0.35	−2.00	−3.60 (0.34)
Finger flexion against gravity	0.91	−0.40	9.90	9.90	−3.60 (0.34)
Finger flexion gravity elim.	1.01	0.10	0.38	−1.80	−3.98 (0.37)