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. 2011 Apr 7;11:55. doi: 10.1186/1471-244X-11-55

Table 5.

Intelligence (Effects of age, status, gender, and Centre)

Age effects Centre effects° Gender effects° Status effects°




N rho p Q Crit Sig Q Crit Sig Q Crit Sig





IQ 1828 -0.106 0.000 91.7 23.4 *** 4.49 4.19 * 7.5 4.2 *
V § 1844 -0.137 0.000 136.2 21.7 *** 8.58 4.01 ** 10.9 4.0 **
S § 1788 -0.117 0.000 86.9 21.6 *** 3.76 4.17 5.1 4.2 *
PC § 1788 -0.060 0.012 110.6 21.5 *** 8.78 4.03 ** 0.7 4.0
BD § 1845 -0.007 0.777 30.5 19.9 ** 2.67 3.97 7.7 4.0 **
DS § 1820 0.002 0.918 42.7 21.7 *** 0.41 4.03 16.3 4.0 ***

IQ Prorated IQ

V Vocabulary

S Simliarities

PC Picture Completion

BD Block Design

DS Digit Span

°Three-way analysis; dependent scores are

adjusted for age (residuals of linear regression)

§ Analyses with collapsed israel samples

Q Test statistic of robust 3-way effects

Crit α = .05 critical value

Sig Two sided α-level

* p < 0.05

** p < .0.01

*** p < .0.001