Table 3.
Comparing the Death Brief Implicit Association Test (BIAT) and the Death Implicit Association Test (IAT)
| Death BIAT n=1161 |
Death IAT n=1855 |
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|---|---|---|---|---|
| 6 Blocks | 4 Blocks | |||
|
|
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| LT-SA vs LT-No SA | Cohen’s D | 0.43 (0.30 – 0.55) | 0.38 (0.25 – 0.51) | 0.50 (0.40 – 0.60) |
| AUC-ROC non-zero threshold | 0.62 (0.59 – 0.66) | 0.61 (0.57 – 0.64) | 0.64 (0.61 – 0.66) | |
| AUC-ROC zero threshold | 0.58 (0.55 – 0.61) | 0.57 (0.55 – 0.61) | 0.58 (0.56 – 0.60) | |
| Sensitivity zero threshold | 0.46 | 0.45 | 0.34 | |
| Specificity zero threshold | 0.70 | 0.69 | 0.82 | |
|
| ||||
| LT-SA vs. LT-SI | Cohen’s D | 0.33 (0.19 – 0.46) | 0.29 (0.18 – 0.45) | 0.36 (0.26 – 0.46) |
| AUC-ROC non-zero threshold | 0.59 (0.56 – 0.63) | 0.58 (0.55 – 0.62) | 0.60 (0.57 – 0.63) | |
| AUC-ROC zero threshold | 0.56 (0.53 – 0.60) | 0.56 (0.53 – 0.59) | 0.56 (0.54 – 0.59) | |
| Sensitivity zero threshold | 0.47 | 0.46 | 0.35 | |
| Specificity zero threshold | 0.65 | 0.66 | 0.78 | |
|
| ||||
| PY-SA vs. LT-SA | Cohen’s D | 0.46 (0.23 – 0.69) | 0.47 (0.19 – 0.68) | 0.20 (0.02 – 0.36) |
| AUC-ROC non-zero threshold | 0.63 (0.57 – 0.69) | 0.63 (0.56 – 0.69) | 0.56 (0.51 – 0.61) | |
| AUC-ROC zero threshold | 0.57 (0.52 – 0.63) | 0.60 (0.52 – 0.63) | 0.56 (0.52 – 0.60) | |
| Sensitivity zero threshold | 0.59 | 0.62 | 0.43 | |
| Specificity zero threshold | 0.57 | 0.60 | 0.69 | |
|
| ||||
| PY-SA vs. PW-SI | Cohen’s D | 0.33 (0.08 – 0.70) | 0.33 (0.07 – 0.71) | 0.38 (0.19 – 0.37) |
| AUC-ROC non-zero threshold | 0.59 (0.52 – 0.67) | 0.59 (0.52 – 0.67) | 0.61 (0.55 – 0.66) | |
| AUC-ROC zero threshold | 0.55 (0.49 – 0.61) | 0.58 (0.52 – 0.64) | 0.58 (0.54 – 0.63) | |
| Sensitivity zero threshold | 0.47 | 0.46 | 0.35 | |
| Specificity zero threshold | 0.65 | 0.66 | 0.78 | |
|
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| Odd-Even Reliability | 0.74 (0.71 – 0.77) | 0.71 (0.67 – 0.74) | 0.76 (0.74 – 0.78) | |
Note: LT-SA vs LT-No SA = Lifetime suicide attempt (BIAT: n=372; IAT: n=598) vs. No lifetime suicide attempt (BIAT: n=789; IAT: n=1257); LT-SA vs. LT-SI = Lifetime suicide attempt (BIAT n=598; IAT n=605) vs. Lifetime suicidal ideation (BIAT n=613; IAT n=941); PY-SA vs. LT-SA = Past year suicide attempt (BIAT n=103; IAT n=198) vs. Lifetime (but not past year) suicide attempt (BIAT n=269; IAT n=400);); PY-SA vs. PW-SI = Past week suicide ideation and past year suicide attempt (BIAT n=76; IAT n=147) vs. past week suicide ideation (with no lifetime history of attempts) (BIAT n=218, IAT n=370). AUC-ROC = Area under the curve for the receiver operating characteristic. Parentheses contain 95% bootstrapped confidence intervals.