Development and testing of the Measure of Innovation-Specific Implementation Intentions (MISII) using Rasch measurement theory

Table 4 Summary of results of Rasch analysis of EBP-specific implementation intentions scale

	Analysis	Overall model fit	Item fit residual mean (SD)	Person fit residual mean (SD)	PSI^a	% Sig. t tests^b
1	Items 1–9	χ² = 35.96, df = 9, p = 0.000	− 0.177 (2.438)	− 0.843 (1.807)	0.898	7.82% CI: 0.046 to 0.110
2	Items 1–8	χ² = 56.89, df = 8, p = 0.000	− 0.646 (3.186)	− 0.701 (1.614)	0.898	8.38% CI: 0.052 to 0.116
3	Items 1–7	χ² = 19.07, df = 7, p = 0.008	− 0.900 (3.023)	− 0.739 (1.387)	0.909	5.59% CI: 0.024 to 0.088
4	Items 1–3, 5–7	χ² = 7.50, df = 6, p = 0.277	− 0.879 (2.374)	− 0.653 (1.209)	0.914	6.70% CI: 0.035 to 0.099
5	Items 1–2, 5–7	χ² = 6.76, df = 5, p = 0.239	− 0.578 (1.766)	− 0.619 (1.136)	0.895	6.70% CI: 0.035 to 0.099
6	Items 2, 5, 6, 7	χ² = 3.20, df = 5, p = 0.526	− 0.372 (1.158)	− 0.654 (1.100)	0.870	5.59% CI: 0.024 to 0.088
7	Items 2, 5, 7	χ² = 2.38, df = 3, p = 0.497	− 0.136 (0.66)	− 0.392 (0.73)	0.872	4.47%

SD standard deviation, χ² chi-square, df degrees of freedom, p probability, PSI person separation index, CI confidence interval
^aPSI with extremes included
^bConfidence interval only reported if the % value exceeds 5%

ISSN: 1748-5908