Skip to main content
. 2013 Aug 12;27(5):595–607. doi: 10.1037/a0033354

Table 1. Descriptive Statistics of Cognitive Ability Tests, Tractography Fractional Anisotropy Measures, and Covariates.

Variable No. missing M SD Skew Kurtosis
Note. WMS-III = Wechsler Memory Scale III UK; WAIS-III = Wechsler Adult Intelligence Scale III UK; ICV = intracranial volume.
Cognitive ability
 WMS-III Logical memory immediate recall 1 45.88 10.18 −0.48 0.30
 WMS-III Logical memory delayed recall 1 28.89 8.08 −0.56 0.26
 WMS-III Verbal paired associates immediate recall 12 2.80 2.30 0.62 −0.66
 WMS-III Verbal paired associates delayed recall 15 6.39 2.09 −1.26 0.57
 WMS-III Spatial span forward 1 7.66 1.65 −0.09 −0.39
 WMS-III Spatial span backward 2 7.08 1.60 −0.06 −0.10
 Verbal fluency total score 1 43.47 12.68 0.23 0.14
 National Adult Reading Test 1 34.57 7.86 −0.54 −0.10
 Wechsler Test of Adult Reading 1 41.26 6.70 −0.93 0.61
 Simple reaction time mean score 0 0.27 0.05 1.66 4.09
 Choice reaction time mean score 0 0.65 0.08 0.89 1.77
 Inspection time total correct responses 11 111.45 11.64 −1.16 3.82
 WAIS-III Digit symbol 1 56.43 12.22 0.11 −0.20
 WAIS-III Digit span backward 0 7.90 2.30 0.28 −0.20
 WAIS-III Block design 2 34.26 9.98 0.47 0.13
 WAIS-III Letter−number sequencing 0 11.01 2.99 0.28 0.41
 WAIS-III Matrix reasoning 1 13.46 4.86 −0.10 −0.93
 WAIS-III Symbol search 1 24.74 6.09 −0.32 0.78
Fractional anisotropy tractography
 Genu of corpus callosum 17 0.41 0.05 −0.07 −0.12
 Splenium of corpus callosum 4 0.49 0.07 −0.30 0.61
 Left arcuate fasciculus 27 0.45 0.04 −0.42 0.50
 Right arcuate fasciculus 87 0.43 0.04 −0.29 0.72
 Left anterior thalamic radiation 105 0.32 0.03 −0.10 0.25
 Right anterior thalamic radiation 20 0.33 0.03 −0.31 0.54
 Left rostral cingulum 23 0.44 0.05 −0.53 0.76
 Right rostral cingulum 13 0.39 0.04 −0.61 1.84
 Left uncinate fasciculus 93 0.33 0.03 −0.13 0.39
 Right uncinate fasciculus 33 0.33 0.03 −0.25 0.47
 Left inferior longitudinal fasciculus 4 0.40 0.05 −0.28 0.08
 Right inferior longitudinal fasciculus 3 0.38 0.05 −0.40 0.18
Covariates
 Age 0 72.6 0.70 −0.00 −0.87
 Atrophy (percent decline) 13 22.39 3.84 0.16 0.10
 White mater lesion volume in ICV (%) 13 0.83 0.91 2.52 10.24
 Fazekas total lesion rating score 6 2.45 1.14 0.83 0.83
Male Female
Sex 0 345 310
Right Left Ambidextrous
Handedness 0 614 38 3