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Table 4 Rasch model parameters

From: Sexuality and contraceptive knowledge in university students: instrument development and psychometric analysis using item response theory

Item Difficulty index Standard error Infit Outfit
4 −2.77 0.18 1.14 1.29
8 −3.22 0.21 0.98 1.15
13 −1.44 0.13 1.12 1.38
15 −0.11 0.12 1.2 1.14
16 1.29 0.13 1.18 1.14
19 −0.18 0.12 1.03 1
26 −0.68 0.12 1.07 1.15
27 0.71 0.12 0.95 1.04
28 −0.69 0.12 0.83 0.75
29 1.70 0.14 1 1.01
30 1.41 0.13 0.84 0.66
31 0.57 0.12 0.92 0.83
32 0.34 0.12 0.87 0.89
33 2.23 0.16 0.89 0.68
34 0.83 0.12 0.98 0.88