Skip to main content

Table 2 Item difficulty estimates with associated error estimates for each item

From: Psychometric assessment of HIV/STI sexual risk scale among MSM: A Rasch model approach

Item Difficulty Estimate Error Estimate Infit Mean Square Outfit Mean Square Infit t Outfit t
Item 1 -4.36 0.17 0.99 1.98 -0.10 2.90
Item 2 -1.80 0.13 1.15 1.18 2.40 1.70
Item 3 2.85 0.43 0.89 1.48 -0.20 0.90
Item 4 1.24 0.24 1.05 0.77 0.30 -0.40
Item 5 1.79 0.29 0.73 0.28 -1.30 -1.60
Item 6 0.48 0.19 0.95 0.71 -0.40 -0.90
Item 7 3.06 0.47 1.08 0.82 0.30 -0.10
Item 8 -0.20 0.16 1.08 1.31 0.80 1.40
Item 9 -3.06 0.14 0.91 0.77 -1.30 -1.60