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Table 1 Intellectual ability in Williams syndrome

From: The effect of intellectual ability on functional activation in a neurodevelopmental disorder: preliminary evidence from multiple fMRI studies in Williams syndrome

Author (year)

n

Age (years)

Measure

FSIQ

VIQ

PIQ

Mean

(Range)

Mean

(Range)

Mean

(Range)

Boddaert et al. (2006)

9

5-15

WISC-III

63

(50–79)

76

(62–91)

53

(43–65)

Don et al. (1999)

18

8-13

WISC-III

52

nr

61

(46–81)

50

(45–62)

Howlin et al. (1998)

62

19-39

WAIS-R

60

nr

64

nr

60

nr

Pagon et al. (1987)

9

10-20

WISC-R

42

(40–75)

54

(45–85)

52

(45–69)

Reiss et al. (2004)

43

12-50

WISC-R, WAIS-R

68

(46–83)

nr

nr

nr

nr

Searcy et al. (2004)

80

17-52

WAIS-R

67

nr

71

nr

66

nr

  1. For each study, participant ages, IQ measure, full scale IQ (FSIQ), verbal IQ (VIQ), and performance IQ (PIQ) are listed. nr, not reported.