Sensitivity to numerosity is not a unique visuospatial psychophysical predictor of mathematical ability.

For both orientation and numerosity sensitivity, the correlation with mathematics scores was highly significant in the adult group ( R = −0.26, P = 1.1 × 10 −4 ; R = −0.26, P = 1.2 × 10 −4 ; N = 216), confirming that the relationship between numerosity sensitivity and mathematics is not restricted to childhood ( Halberda et al., 2012 ).

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In contrast, in the pre-adult population the effect only approached significance ( R = −0.2, P = 0.08; R = −0.21, P = 0.06).

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