TABLE 4

Neuropsychological Performance

VariableAdolescent AN Mean ± SD (N = 66)Control Mean ± SD (N = 42)P (2-tailed)Effect Size (Cohen's d)
WJ-III clusters
Tests of cognitive abilities
    Verbal ability95.4 ± 9.5100.9 ± 10.6.0060.55
    Thinking ability107.3 ± 10.7111.9 ± 11.2.040.42
    Cognitive efficiency106.1 ± 15.1114.2 ± 16.5.010.52
    Working memory102.3 ± 12.4107.5 ± 14.8.050.39
Tests of achievement
    Oral language98.8 ± 11.0103.0 ± 13.8.100.35
    Broad reading108.4 ± 10.3114.6 ± 14.3.020.52
    Broad math98.3 ± 11.5105.1 ± 13.8.0060.55
    Broad written language111.2 ± 12.1115.1 ± 12.7.110.32
HVLT-Ra
    Total recall41.6 ± 12.143.6 ± 9.4.370.18
    Delayed recall41.9 ± 12.749.1 ± 10.8.0030.60
    Recognition44.2 ± 12.048.9 ± 11.0.050.40
WMS-R
    Visual reproduction61.0 ± 25.767.9 ± 22.9.160.28
    Delayed visual reproduction54.3 ± 29.166.6 ± 27.1.030.43
  • a Data show control subjects (n = 41).