Rasch analysis of the participation scale (P-scale): usefulness of the P-scale to a rehabilitation services network

Table 3 Item fit statistics for the 17 P-Scale items from the Rasch Analysis

P-Scale Items		First Rasch Analysis (n = 302)				Final Rasch Analysis (n = 281)
		Infit Statistics		Outfit Statistics		Infit Statistics		Outfit Statistics
		MNSQ	ZSTD	MNSQ	ZSTD	MNSQ	ZSTD	MNSQ	ZSTD
N1 Opportunity to find work		1.01	0.2	0.96	−0.3	1.02	0.3	0.97	−0.2
N2 Work as hard		0.98	−0.3	0.89	−0.9	1.00	0.1	0.87	−0.8
N3 Contribute economically to household		0.89	−1.5	0.74	−2.0	0.95	−0.7	0.80	−1.4
N4 Visit places outside village/neighborhood		0.99	−0.1	0.92	−0.8	1.06	0.8	0.99	0.0
N5 Take part in festivals and rituals		0.93	−0.6	0.78	−0.8	0.91	−0.8	0.68	−1.1
N6 Take part in casual recreational/social activities		0.90	−1.5	0.94	−0.6	0.91	−1.2	0.97	−0.2
N7 Socially active		0.86	−1.9	0.74	−1.7	0.86	−1.7	0.76	−1.4
N8 Same respect in community		1.07	0.6	1.68 ^a	1.9	1.01	0.1	0.79	−0.4
N9 Opportunity to take care of yourself		0.96	−0.5	0.84	−1.2	1.03	0.4	0.94	−0.4
N11 Visit other people in community		0.82	−2.3	0.84	−1.0	0.83	−2.2	0.71	−1.7
N12 Move around inside/outside house/village/neighbourhood		0.97	−0.4	0.98	−0.2	1.01	0.2	1.02	0.2
N13 Visit public places in village neighborhood		0.89	−1.0	0.73	−1.1	0.93	−0.6	0.83	−0.6
N14 Household work		1.11	1.7	1.25	2.4	1.16	2.2	1.40	3.3
N15 Opinion count in family discussions		1.25	2.0	2.03 ^a	3.0	–	–	–	–
N16 Help other people		1.06	0.5	0.84	−0.4	1.07	0.5	0.72	−0.8
N17 Comfortable meeting new people		1.27	2.4	1.31	1.2	1.33	2.9	1.42	1.5
N18 Confident to learn new things		1.06	0.6	1.40	1.6	1.03	0.3	0.97	0.0
	Mean	1.00	−0.1	1.05	−0.1	1.01	0.0	0.93	−0.3
	SD	0.12	1.3	0.36	1.4	0.12	1.3	0.21	1.2

Note: The MNSQ acceptable limits to productive measurement were 0.5–1.5. Values beyond these limits are considered misfitting. MNSQ Mean Square, ZSTD Z Standardized Statistic
^aItems showing misfit

ISSN: 1471-2458