Model | χ2 | df | p-value | RMSEA | 90% C.I. for RMSEA | CFI | TLI |
---|---|---|---|---|---|---|---|
One-factor model | 112.326 | 77 | .005 | 0.055 | 0.031–0.076 | 0.987 | 0.985 |
Three-factor model | 94.235 | 74 | .056 | 0.042 | 0.000–0.066 | 0.993 | 0.991 |
IRT parameterisation | One-factor model | Three-factor model | |||||
Item difficulty | Item discrimination | Item difficulty | Item discrimination | ||||
Item 1 | −0.347 | 1.130 | −0.334 | 1.238 | |||
Item 2 | 0.374 | 2.223 | 0.358 | 3.110 | |||
Item 3 | 0.613 | −2.018 | −0.591 | 2.510 | |||
Item 4 | 0.241 | 2.682 | 0.230 | 5.199 | |||
Item 5 | 0.733 | −1.401 | −0.713 | 1.530 | |||
Item 6 | 1.681 | 0.796 | 1.633 | 0.835 | |||
Item 7 | −0.100 | 1.530 | −0.097 | 1.724 | |||
Item 8 | 1.023 | 1.333 | 0.994 | 1.449 | |||
Item 10 | 0.503 | 2.315 | 0.495 | 2.614 | |||
Item 11 | 0.538 | 1.580 | 0.527 | 1.708 | |||
Item 12 | 0.070 | 1.530 | 0.068 | 1.724 | |||
Item 13 | 0.312 | −1.649 | −0.302 | 1.891 | |||
Item 14 | −0.059 | 0.742 | −0.057 | 0.788 | |||
Item 15 | −0.180 | 1.151 | −0.175 | 1.242 |