Table 3 Distribution and statistics of IQ measures.

From: A longitudinal resource for population neuroscience of school-age children and adolescents in China

IQ Measures

Sample

Median

Mean

SD

Shapiro–Wilk Test

Rank-Sum Test

W-value

P-value

W-value

P-value

FSIQ

CKG

111

111.54

12.08

0.99

0.01

99068.50

0.00

PEK

121

120.58

15.49

1.00

0.68

devCCNP

115

115.52

14.39

0.99

0.00

/

PSI

CKG

104

106.71

14.00

0.96

0.00

71633.00

0.92

PEK

104

106.79

15.52

0.98

0.00

devCCNP

104

106.75

14.67

0.97

0.00

/

WMI

CKG

97

98.90

10.85

0.97

0.00

105471.00

0.00

PEK

109

110.11

14.37

0.99

0.02

devCCNP

103

103.77

13.67

0.98

0.00

/

PRI

CKG

106

107.85

12.49

0.99

0.01

100167.00

0.00

PEK

118

117.69

15.30

0.99

0.00

devCCNP

112

112.12

14.61

0.99

0.00

/

VCI

CKG

118

118.47

15.48

0.98

0.00

82407.50

0.00

PEK

122

123.34

18.56

0.99

0.01

devCCNP

120

120.59

17.05

0.99

0.00

/

  1. 1Median, mean and standard deviation of FSIQ and each of four indices. Shapiro-Wilk test of median values suggests that the sample data commonly disobey a Gaussian distribution, except FSIQ of PEK Sample. Between two sites, Rank-Sum test of each indices shows only PSI has no significant difference. FSIQ, Full Scale Intelligence Quotient; PSI, Processing Speed Index; WMI, Working Memory Index; PRI, Perceptual Reasoning Index; VCI, Verbal Comprehension Index.