Table 2 Estimates of discrimination and difficulty parameters of ITMAIS-m, under the GRM
Discrimination | Difficulty | ||||
|---|---|---|---|---|---|
α(SE) | β1(SE) | β2(SE) | β3(SE) | β4(SE) | |
Item 3 | 5.062(0.169) | − 0.818(0.027) | − 0.256(0.024) | 0.073(0.023) | 0.390(0.024) |
Item 4 | 4.587(0.148) | − 0.262(0.024) | 0.275(0.024) | 0.746(0.026) | 1.092(0.029) |
Item 5 | 3.957(0.122) | − 1.146(0.031) | − 0.504(0.025) | − 0.059(0.024) | 0.295(0.025) |
Item 6 | 3.998(0.121) | − 0.915(0.029) | − 0.073(0.024) | 0.414(0.025) | 0.728(0.026) |
Item 7 | 4.944(0.163) | − 0.188(0.024) | 0.302(0.023) | 0.670(0.025) | 0.944(0.027) |
Item 8 | 4.394(0.146) | − 0.023(0.024) | 0.332(0.023) | 0.711(0.026) | 1.074(0.030) |
Item 9 | 5.431(0.221) | − 0.229(0.024) | − 0.106(0.023) | 0.014(0.023) | 0.098(0.023) |
Item 10 | 3.947(0.137) | 0.190(0.024) | 0.628(0.026) | 0.941(0.028) | 1.150(0.031) |