Table 3.
Exposure Control Results for the Item Selection Methods.
| Item selection methods | Maximum exposure rate | Overexposed items | Unused items | χ2 |
|---|---|---|---|---|
| Between-item pool | ||||
| Correlation = .8 | ||||
| R | 0.040 | 0 | 0 | 0.198 |
| MDFIM | 0.702 | 59 | 779 | 279.896 |
| MPI | 0.078 | 0 | 0 | 4.146 |
| MMPI | 0.076 | 0 | 0 | 3.774 |
| Correlation = .4 | ||||
| R | 0.039 | 0 | 0 | 0.195 |
| MDFIM | 0.774 | 58 | 790 | 297.330 |
| MPI | 0.084 | 0 | 0 | 5.313 |
| MMPI | 0.079 | 0 | 0 | 4.402 |
| Within-item pool | ||||
| Correlation = .8 | ||||
| R | 0.038 | 0 | 0 | 0.195 |
| MDFIM | 0.527 | 53 | 743 | 206.456 |
| MPI | 0.081 | 0 | 0 | 5.172 |
| MMPI | 0.104 | 0 | 138 | 23.616 |
| Correlation = .4 | ||||
| R | 0.038 | 0 | 0 | 0.196 |
| MDFIM | 0.573 | 58 | 751 | 239.314 |
| MPI | 0.078 | 0 | 0 | 6.224 |
| MMPI | 0.102 | 0 | 130 | 21.181 |
Note. Four item selection methods in this study were (a) the randomized (R) item selection, (b) the MDFIM, (c) the MPI, and (d) the MMPI. MDFIM = maximum determinant of the Fisher information matrix; MPI = multidimensional priority index; MMPI = modified multidimensional priority index.