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Table 1 Rasch model individual item fit

From: The validity of a professional competence tool for physiotherapy students in simulation-based clinical education: a Rasch analysis

One week Two week Short-form Clinical Placement
Item Measure Infit
(mnsq)
Outfit
(mnsq)
Number of responses (n) Item Measure Infit
(mnsq)
Outfit
(mnsq)
Number of responses (n) Item Measure Infit
(mnsq)
Outfit
(mnsq)
Number of responses (n) Item Measure Infit
(mnsq)
Outfit
(mnsq)
Number of responses (n)
18 2.13 .85 .98 114 18 2.27 .71 .63 156 18 1.65 1.59 1.51 28 17 1.44 .82 .78 289
8 1.13 1.17 1.46 147 17 1.73 .72 .65 181 12 1.05 1.39 1.38 189 12 1.40 .94 .93 289
12 1.13 1.06 1.11 147 12 1.52 .79 .82 172 17 .98 .89 .85 291 10 1.17 .92 .88 288
6 1.00 .99 .90 147 10 1.42 .96 .85 179 16 .92 1.01 .98 523 18 1.14 .90 .88 280
10 .82 .75 .61 147 8 1.35 .73 .70 180 14 .88 1.11 1.10 532 11 1.09 .82 .78 289
9 .77 .47 .39 147 11 1.28 .79 .77 177 15 .49 .98 .96 532 13 .95 .87 .84 289
16 .73 1.05 .89 147 19 .94 1.05 1.09 178 10 .43 .83 .84 554 8 .76 .80 .74 289
11 .64 .73 .74 147 9 .89 .66 .63 180 7 .42 1.04 1.00 557 19 .67 .92 .89 289
17 .64 .45 .33 147 6 .78 1.07 1.18 178 11 .40 .89 .94 514 16 .51 1.02 .99 288
13 .42 .54 .54 147 16 .69 1.02 1.14 181 9 .35 .91 .90 607 9 .43 .75 .72 289
20 .31 .99 1.01 147 13 .55 .66 .66 180 19 .16 .68 .64 271 15 .13 1.03 1.00 289
7 .30 .78 .86 147 14 .38 .83 .82 180 13 .13 .85 .83 406 7 .05 .93 .93 289
14 .30 .42 .41 147 7 .08 .96 .96 181 20 -.02 .95 .97 534 14 .03 .67 .65 289
19 .09 1.60 1.54 147 15 -.03 1.06 1.12 181 8 -.10 .80 .79 507 20 .02 .96 .99 287
15 -.44 1.27 1.58 147 20 -.80 1.03 .97 181 5 -.15 1.13 1.07 601 5 -.56 1.26 1.29 289
5 −1.27 1.41 1.58 147 5 −1.41 1.22 1.33 181 4 -.43 1.36 1.38 343 6 -.62 1.20 1.20 289
3 −1.99 1.06 1.09 147 4 −2.68 1.31 1.34 181 3 −1.19 1.15 1.02 305 4 −1.43 1.26 1.29 288
4 −2.09 1.37 1.49 147 3 −2.75 1.00 1.00 181 2 −1.35 .81 .76 285 2 −2.02 1.36 1.43 289
1 −2.31 .96 .89 147 2 −2.99 1.86 1.86 181 1 −1.45 1.17 1.13 641 3 −2.30 1.32 1.34 289
2 −2.31 .96 .89 147 1 −3.19 1.03 1.04 181 6 −3.15 1.83 1.58 11 1 −2.86 1.30 1.28 289
  1. Key: The four simulation assessment formats are presented individually. One week and Two week represent the longitudinal simulation assessment formats that were undertaken after one and two weeks of time spent in simulation respectively. Short-form assessments were those undertaken in a single 25 min exam in simulation. Clinical placement represents longitudinal assessments undertaken after a completed clinical placement in a hospital or clinic setting. Items are listed from most to least difficult for each separate assessment format. The measure score places each item along a hierarchy of difficulty. The infit and outfit scores are presented in mean-squares (mnsq) and indicate a wellness of fit of an individual item to the Rasch model. The number of times each item was scored by an educator in each format is also displayed as number of responses ‘n