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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: Dev Sci. 2014 Aug 6;18(3):351–372. doi: 10.1111/desc.12216

Figure 1. Behavioral performance in DD and TD children on addition and subtraction problems.

Figure 1

(A) Children with developmental dyscalculia (DD) were significantly less accurate than typically developing (TD) children during subtraction problem solving (p = .001), but this difference was marginally significant for addition problems (p = .074). (B) On correctly performed trials, children with DD were significantly slower than TD children for addition (p = .012), but did not differ on subtraction (p = .191), although the interaction did not reach significance (p = .217). *p < .05; ***p < .001.