Table 2.
Descriptive statistics and bivariate correlations for symptom measures, 9-item IBIP, and IBIP subscales in studies 2 (analog sample) and 3 (clinical sample).
| Measure | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Study 2 | ||||||
| l. IBIP | -- | |||||
| 2. IBIP Intr. fx | .82* | -- | ||||
| 3. IBIP H/A fx | .83* | .45* | -- | |||
| 4. PCL-C | .75* | .61* | .66* | -- | ||
| 5. PSWQ | .64* | .43* | .64* | .66* | -- | |
| 6. BDI-II | .60* | .43* | .55* | .66* | .73* | -- |
| M | 27.63 | 13.79 | 15.49 | 36.47 | 39.61 | 12.65 |
| SD | 10.06 | 5.99 | 4.79 | 16.04 | 12.34 | 9.76 |
| Range | 9–36 | 4–18 | 5–24 | 17–85 | 0–58 | 16–64 |
| Study 3 | ||||||
| l. IBIP total | -- | |||||
| 2. IBIP Intr. fx | .54* | -- | ||||
| 3. IBIP H/A fx | .89* | .52* | -- | |||
| 4. PCL-C | .72* | .67* | .60* | -- | ||
| 5. PSWQ | .39* | .20* | .46* | .39* | -- | |
| 6. BDI-II | .58* | .44* | .56* | .70* | .49* | -- |
| M | 23.74 | 8.58 | 15.16 | 45.60 | 60.48 | 25.76 |
| SD | 8.43 | 4.44 | 5.21 | 16.31 | 13.21 | 12.37 |
| Range | 9–45 | 4–20 | 5–25 | 17–85 | 25–80 | 0–59 |
Note. IBIP = 9-item Interpretation Bias Index for PTSD; IBIP Intr. fx = 4-item IBIP ‘intrusions’ factor; IBIP H/A fx = 5-item IBIP ‘hypervigilance/avoidance’ factor; PCL-C = PTSD Check List- Civilian Version; PSWQ = Penn State Worry Questionnaire; BDI-II = Beck Depression Inventory-II.
*
p < .001