Table 5.

Behavioral criteria statistics for 10-behavior short form of hand movements item.

	Dimensionality				Item difficulty
	Infit MnSq	ZStd	Outfit MnSq	ZStd	Measure (standard error)
Finger intrinsic against gravity	0.78	−2.40	9.90	9.90	5.57 (0.21)
Timed thumb opposition	1.45	4.20	1.50	1.20	4.93 (0.19)
Finger intrinsic gravity elim.	0.62	−4.50	9.90	9.90	4.32 (0.19)
Wrist radial dev. against gravity	1.18	1.30	1.90	1.90	0.82 (0.21)
Wrist radial dev. gravity elim.	0.92	−0.50	0.44	−1.30	−0.92 (0.24)
Wrist extension against gravity	0.76	−1.80	0.36	−1.50	−1.75 (0.25)
Finger extension against gravity	0.91	−0.60	0.37	−1.50	−1.96 (0.25)
Forearm supination	0.85	−1.0	0.28	−1.90	−2.40 (0.26)
Any thumb motion	1.04	0.30	0.56	−0.80	−3.69 (0.30)
Finger flexion gravity elim.	0.99	0.00	0.61	−0.90	−4.91 (0.39)