Appendix.
Neurocognitive areas of function, tests, and test characteristics
| Functional Area | Test | Indices & Subtests | Normative M/SD |
|---|---|---|---|
| Global Intellectual Function | Wechsler Preschool & Primary Intelligence Scale, Revised (WPPSI-R) for ages 4-6 years | Full Scale IQ (FSIQ), Verbal IQ (VIQ), Performance IQ (PIQ) | M=100, SD=15a |
| Wechsler Intelligence Scale for Children, 3rd Edition (WISC-III) for ages 6-16 years | |||
| Verbal Abilities | WPPSI-R or WISC-III | Verbal Comprehension Index (VCI) | M=100, SD=15a |
| Perceptual and Spatial Abilities | WPPSI-R or WISC-III | Perceptual Organization Index (POI) | M=100, SD=15a |
| Spatial Planning | NEPSY | Tower Test Scaled Score | M=10, SD=3b |
| Beery Test of Visual-Motor Integration (VMI) | VMI Standard Score | M=100, SD=15a | |
| Attention & Concentration | WPPSI-R or WISC-III | Freedom from Distractibility Index (FDI) | M=100, SD=15a |
| Conners Continuous Performance Test (CPT) | Omission Errors, Commission Errors, Inattentiveness, Impulsivity, Variability, Reaction Time, Risk, Vigilance Scales | M=50, SD=10c | |
| Processing Speed | WPPSI-R or WISC-III | Processing Speed Index (PSI) | M=100, SD=15a |
| Woodcock-Johnson, Revised (WJR) | Processing Speed Cluster | M=100, SD=15a | |
| Memory | Wide Range Assessment of Memory and Learning (WRAML) | Overall Memory Index Memory Subtests: Verbal Learning, Picture Memory, Story Memory, Design Memory |
M=100, SD=15a M=10, SD=3b |
a
Standard Scores <70 considered impaired, scores >70 and <85 considered below average
b
Scaled Scores <4 considered impaired, scores >4 and <7 considered below average
c
T-Scores>60 considered clinically significant