Table 3 Application of the IRT model and CAT simulation
|  | Number of items | Number of respondents | Average number of items administered | PCC between θest and θtrue (95% confidence interval) |
|---|---|---|---|---|
Momentary depression | 54 | 586 | 4.816 | 0.950 (0.942–0.957) |
Momentary anxiety | 6 | 612 | 3.724 | 0.992 (0.990–0.993) |
Momentary positive affect | 18 | 603 | 6.516 | 0.979 (0.975–0.982) |
Recent one-week depression | 57 | 584 | 8.038 | 0.969 (0.964–0.974) |
Recent one-week anxiety | 14 | 610 | 6.330 | 0.976 (0.972–0.980) |
Recent one-week positive affect | 16 | 604 | 4.565 | 0.967 (0.962–0.972) |