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Correlations among the five ability constructs specified in the VCAP data. The first number in each set is the correlation ignoring age, and the second is the correlation after partialling age-related variation from each variable. Gc refers to crystallized ability, Reas to inductive reasoning, Space to spatial visualization, Mem to (verbal) memory, and Spd to speed. All portrayed correlations are significantly different from zero (p < .01).
