Table 2.
Tested measures
| N | Mean (SD) | 95% CI | % Impaired | |
|---|---|---|---|---|
| Clinical Neurocognitive Performance2 | ||||
| WASI3 | ||||
| Full Scale IQ | 136 | 100.0 (14.4) | 97.5–102.4 | 15.4 |
| Conners’ Continuous Performance Test-II4 | ||||
| Omissions | 135 | 51.8 (15.0) | 49.2–54.3 | 14.8 |
| Commissions | 135 | 51.6 (10.5) | 49.8–53.4 | 25.2 |
| Hit Reaction Time | 135 | 50.7 (10.3) | 49.0–52.5 | 17.0 |
| Variability | 135 | 50.2 (10.4) | 48.5–52.0 | 22.2 |
| Detectability (d prime) | 135 | 51.5 (10.5) | 49.7–53.3 | 17.8 |
| Beta | 135 | 50.4 (9.0) | 48.9–51.9 | 10.4 |
| WISC-IV/ WAIS-IV 5 | ||||
| Processing Speed Index6 | 137 | 97.0 (14.8) | 94.5–99.5 | 22.6 |
| Digit Span7 | ||||
| Forward | 136 | 9.0 (3.1) | 8.5–9.5 | 35.3 |
| Backward | 136 | 9.2 (3.0) | 8.7–9.7 | 27.2 |
| WISC-IV-IN/WMS-III8 | ||||
| Spatial Span7 | ||||
| Forward | 137 | 9.7 (3.0) | 9.2–10.2 | 24.8 |
| Backward | 137 | 9.8 (3.1) | 9.3–10.4 | 27.7 |
| Research Measure Performance9 | ||||
| N-back10 | ||||
| 0-Back | ||||
| Accuracy | 137 | 83.4 (16.1) | 80.7–86.1 | |
| Reaction time | 134 | 539.3 (159.1) | 512.1–566.5 | |
| 1-Back | ||||
| Accuracy | 135 | 73.6 (20.6) | 70.0–77.1 | |
| Reaction time | 132 | 601.8 (217.3) | 564.4–639.2 | |
| 2-Back | ||||
| Accuracy | 132 | 59.5 (24.9) | 55.2–63.8 | |
| Reaction time | 129 | 703.3 (299.7) | 651.1–755.5 | |
Impairment defined as performance ≤ 1 SD below the normative mean and ≥1SD above the normative mean for measures where higher scores equal worse performance.
Measures are nationally standardized.
Wechsler Abbreviated Scale of Intelligence, IQ reported as Standard Score
A sustained attention and cognitive control task, CPT-II measures represent age adjusted T-Scores, with higher scores representing worse performance.
Wechsler Intelligence Scale for Children-IV / Wechsler Adult Intelligence Scale-III; WISC-IV administered to survivors 16 and younger, WAIS-IV administered to survivors 17 and older.
PSI is computed as a standard score from Coding/Symbol Search subtests of the WISC-IV/WAIS-IV.
Scores listed are age adjusted scaled scores.
Wechsler Intelligence Scale for Children-IV-IN / Wechsler Memory Scale-III; WISC-IV-IN administered to children 16 and younger; WMS-III administered to survivors 17 and older.
Non-standardized measure used for research purposes only. Reaction times are in milliseconds and accuracy represents percent correct
WM measure that varies WM load. Difficulty increases from 0 to 2-back. Two survivors refused to continue the task after the 0-back condition. Three survivors demonstrated a response style on 2-back that warranted removal: 1 survivor omitted >50% of responses, while 2 survivors demonstrated error rates for both targets and non-targets indicative of random responding. For three of the survivors the E-prime software malfunctioned and their reaction time data was lost.