TABLE 2.
Mean (SD) | Range | Effect Size3 | % Impaired Observed | % Impaired Expected4 | Z-score5 | |
---|---|---|---|---|---|---|
WMI1 | 94.45 (15.50)** | 62-33 | 0.36 | 12.68 | 6.68 | 1.47 |
PSI1 | 85.28 (14.84)*** | 53-117 | 0.98 | 31.88 | 6.68 | 4.74 |
Math Calculation2 | 94.24 (15.41)** | 61-134 | 0.37 | 12.68 | 6.68 | 1.47 |
Working Memory Index from the Wechsler Intelligence tests.
Processing Speed Index from the Wechsler Intelligence tests.
Composite score of Wechsler Individual Achievement, Third Edition (WIAT-III) Numerical Operations and Kaufman Test of Educational Achievement, Third Edition (KTEA-3) Math Calculation subtests.
Expected rate of impairment based on a normal distribution.
Cohen’s d; small=.2, medium =.5, large =.8.
z-score ratio for the significance of the difference between % impaired observed and % impaired expected.
P<0.05.
P <0.01.
P <0.001.