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Table 2 Mean, standard deviation, minimum and maximum of measurement, infit, outfit, and error for items and person

From: Comparison of formula and number-right scoring in undergraduate medical training: a Rasch model analysis

  Items Person
Measure Infit Outfit Error Measure Infit Outfit Error
Test 1 FS Mean 0.00 1.00 1.00 0.12 0.32 1.04 1.00 0.13
SD 0.55 0.05 0.10 0.05 0.25 0.37 0.41 0.01
Minimum −1.85 0.91 0.52 0.05 −0.38 0.41 0.36 0.11
Maximum 1.55 1.22 1.48 0.38 1.54 2.51 2.21 0.21
NR Mean 0.00 1.00 1.00 0.20 0.24 1.00 1.00 0.23
SD 1.17 0.06 0.10 0.07 0.50 0.09 0.20 0.01
Minimum −4.15 0.84 0.79 0.17 −1.32 0.81 0.72 0.22
Maximum 2.57 1.12 1.37 0.71 1.57 1.29 2.58 0.26
  FS Mean 0.00 1.00 1.03 0.12 0.33 1.03 1.03 0.12
Test 2 SD 0.59 0.05 0.14 0.05 0.25 0.35 0.44 0.01
Minimum −2.68 0.90 0.83 0.05 −0.31 0.27 0.34 0.11
Maximum 1.71 1.25 2.02 0.39 1.27 2.14 3.46 0.18
NR Mean 0.00 1.00 0.99 0.18 0.24 1.00 0.99 0.22
SD 0.90 0.06 0.10 0.03 0.51 0.10 0.15 0.01
Minimum −2.32 0.85 0.66 0.17 −1.53 0.78 0.66 0.22
Maximum 2.42 1.13 1.19 0.30 1.75 1.32 1.53 0.27
  1. FS formula-scoring group, NR number-right scoring group