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. 2007 Mar;42(4):743–753. doi: 10.1016/j.paid.2006.08.010

Table 2.

Males: percentage of variance explained by PCI

Age & Ability group Sample A: PC1 Sample B: PC1
7 Low 46.32 45.07
7 High 43.41 41.82



9 Low 55.24 52.02
9 High 50.23 51.89



10 Low 54.14 57.76
10 High 52.33 54.22