Table 2.
Item parameter estimates and standard errors accounting for DIF.
| Discrimination | Severity | ||||
|---|---|---|---|---|---|
| Item | P+ | Estimate | SE | Estimate | SE |
| 1. complains of loneliness (young)a | .20 | 1.48 | .12 | 1.06 | .12 |
| 1. complains of loneliness (old)a | .19 | 1.48 | .12 | 1.47 | .12 |
| 2. cries a lot (young female)a | .36 | 0.76 | .10 | 0.59 | .34 |
| 2. cries a lot (young male)a | .24 | 0.76 | .10 | 1.49 | .24 |
| 2. cries a lot (old female) | .23 | 1.98 | .40 | 1.24 | .15 |
| 2. cries a lot (old male) | .08 | 1.07 | .32 | 2.76 | .65 |
| 3. fears might do bad (young) | .17 | 1.09 | .22 | 1.52 | .30 |
| 3. fears might do bad (old) | .17 | 1.91 | .27 | 1.40 | .13 |
| 4. has to be perfect (young) | .32 | 1.64 | .23 | 0.43 | .11 |
| 4. has to be perfect (old) | .52 | 0.79 | .15 | 0.06 | .16 |
| 5. complains no one loves him/her (young) | .23 | 1.32 | .22 | 0.96 | .18 |
| 5. complains no one loves him/her (old) | .24 | 1.96 | .26 | 1.07 | .10 |
| 6. feels worthless | .21 | 2.44 | .24 | 0.98 | .06 |
| 7. nervous/high strung/tense | .21 | 1.34 | .15 | 1.30 | .13 |
| 8. too fearful/anxious (young female)a | .09 | 2.00 | .16 | 1.20 | .11 |
| 8. too fearful/anxious (young male)a | .16 | 2.00 | .16 | 1.20 | .11 |
| 8. too fearful/anxious (old female)a | .19 | 2.00 | .16 | 1.41 | .13 |
| 8. too fearful/anxious (old male)a | .21 | 2.00 | .16 | 1.11 | .12 |
| 9. feels too guilty (young)a | .05 | 2.62 | .24 | 1.70 | .14 |
| 9. feels too guilty (old)a | .17 | 2.62 | .24 | 1.31 | .08 |
| 10. self-conscious | .52 | 1.37 | .14 | -0.11 | .07 |
| 11. unhappy/sad/depressed | .21 | 2.49 | .25 | 0.95 | .06 |
| 12. worries | .37 | 2.07 | .19 | 0.43 | .06 |
| 13. feels others out to get him/her | .10 | 1.55 | .21 | 1.93 | .18 |
Note. N = 1026. P+ is the proportion of participants with valid data endorsing the item.
a
These sub-items had discrimination parameters constrained to be equal across groups as suggested by the DIF results.