Table 3.
Description of variables included in analyses.
| Observed Variable/Measure1 | Description | Functional Domain |
|---|---|---|
| Cambridge Neuropsychological Test Automated Battery (CANTAB) | ||
| CANTAB Spatial Recognition Memory Percent Correct (z score) | Percent correct on the spatial recognition memory test | Visual Memory, Spatial Reasoning |
| CANTAB Spatial Span Length (z score) | Longest span length with no errors on the spatial span test | Executive Function, Spatial Reasoning, Visual Memory |
| CANTAB Spatial Working Memory Strategy (z score) | Strategy score on the spatial working memory test | Executive Function, Spatial Reasoning, Visual Memory |
| CANTAB Spatial Working Memory Total Errors (z score) | Total number of errors on the spatial working memory test | Executive Function, Spatial Reasoning |
| Delis-Kaplan Executive Function System (D-KEFS) | ||
| D-KEFS Trail Making Combined Number/Letter (scaled score) | Combined score on number and letter sequencing of the trail making test | Executive Function, Sequencing |
| D-KEFS Trail Making Test – Switch vs. Number (scaled score) | Difference between switching and number sequencing on the trail making test | Executive Function, Cognitive Flexibility |
| D-KEFS Trail Making Test – Switch vs. Visual (scaled score) | Difference between switching and visual scanning on the trail making test | Executive Function |
| D-KEFS Trail Making Test – Switch Errors (scaled score) | Total number of errors on the switching subtest of the trail making test | Executive Function, Cognitive Flexibility |
| D-KEFS Verbal Fluency Total Correct Letter (scaled score) | Total number of correct words produced over 3 letters on the verbal fluency test | Executive Function, Fluency |
| D-KEFS Verbal Fluency Total Correct Category (scaled score) | Total number of correct words produced over 2 categories on the verbal fluency test | Executive Function, Fluency |
| D-KEFS Verbal Fluency Total Correct Switch (scaled score) | Total number of correct words produced during switching task, regardless of switching accuracy, on the verbal fluency test | Executive Function, Cognitive Flexibility |
| D-KEFS Verbal Fluency 2nd Interval Correct (scaled score) | Total number of correct words produced during 2nd 15 seconds summed across all trials of the verbal fluency test | Executive Function, Fluency |
| D-KEFS Verbal Fluency Set Loss Errors (scaled score) | Total number of set loss errors made during entire subtest of the verbal fluency test | Executive Function, Set Maintenance |
| Morris Virtual Water Maze (MVWM) | ||
| Morris Virtual Water Maze Time in Target Quadrant on Probe Trial (raw score) | Amount of time in seconds spent in the target quadrant during probe trial on the Morris virtual water maze test | Spatial Learning |
| Neurobehavioral Evaluation System 3 (NES3) | ||
| NES3 Animals Following subtest, Number Correct (raw score) | Number of correct responses for the CPT animal following subtest | Sustained Attention |
| NES3 Animals Repeating subtest, Number Correct (raw score) | Number of correct responses for the CPT animal repeating subtest | Sustained Attention |
| NES3 Animals Single subtest, Number Correct (raw score) | Number of correct responses for the CPT animal single subtest | Sustained Attention |
| Grooved Pegboard Test | ||
| Grooved Pegboard Test Dominant hand Completion Time (z-score) | Subject's time in seconds to complete 2 rows (≤ 8 years of age) or 5 rows (≥ 9 years of age) using dominant hand on the grooved pegboard test | Fine Motor |
| Grooved Pegboard Test Non-Dominant Hand Completion Time (z-score) | Subject's time in seconds to complete 2 rows (≤ 8 years of age) or 5 rows (≥ 9 years of age) using nondominant hand on the grooved pegboard test | Fine Motor |
| Progressive Planning Test (PPT) | ||
| Progressive Planning Test Maximally Constrained Total Score (raw score) | Total number of points on the maximally constrained condition of the progressive planning test | Executive Function, Planning |
| Visual Discrimination Reversal Learning Test (VDRL) | ||
| Visual Discrimination Reversal Learning Test Number of Reversals (raw score) | Total number of reversals within 30 trials after phase 2 on the visual discrimination reversal learning test | Executive Function, Cognitive Flexibility |
| Visual Motor Integration Test (VMI) | ||
| Visual Motor Integration Test Total (standard score) | Performance on the visual-motor integration test | Visual-Motor |
1
included variables were selected from 547 neuropsychologic variables collected. Only meaningful, nonredundant neuropsychologic variables that had medium to large effect sizes for detecting group differences were retained for analysis.