Table 2.
Characteristics of Computerized Adaptive Testing (CAT) scores: reliability and number of items administered.
| Anger | Depression | Fatigue | |
|---|---|---|---|
| Reliability of individual CAT scores | |||
| Mean (SD) | .91 (0.03) | .93 (0.05) | .94 (0.01) |
| Median | .92 | .94 | .95 |
| Range | .74 - .93 | .73 - .96 | .91 - .96 |
| Number of CAT items administered | |||
| Mean (SD) | 6.24 (1.90) | 5.25 (2.44) | 4.17 (0.77) |
| Median | 5.00 | 4.00 | 4.00 |
| Range | 5 - 12 | 4 - 12 | 4 - 9 |
Note: Reliabilities were derived from IRT-based standard errors (SE) for individual T-scores, calculated as reliability = 1 - (SE/10)2.