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Table 1 Mean standard score in the screening tests for each group and the average standard score of the two groups

From: Symbolic and non symbolic numerical representation in adults with and without developmental dyscalculia

  Text reading Rapid naming Phoneme omission Questionnaire Simple calculation Number line positioning Procedural knowledge
  Acc RT Letters Numbers Acc RT A B C D Acc RT Acc RT Acc RT
DDs .59 .16 .66 -.04 .01 .07 -.24 -.35 .37 .14 −1.36 −1.06 −1.35 .34 −1.72 −1.31
Controls .67 .67 1.06 .82 .45 .23 .19 .16 .31 .04 0.7 .35 1.3 .27 .67 .58
Average .63 .41 .88 .42 .25 .16 -.01 -.08 .34 .08 -.25 -.31 -.34 .3 -.44 -.3
T -.38 −1.21 −1.63 −3.18** −1.78 -.59 −1.16 -.95 -.01 .36 −5.9** −4.4** −5.89** -.31 −7.13** −6.1**
  1. Note: a, Attention in adulthood; b, Attention in childhood; c, Impulsiveness and hyperactivity in adulthood; d, Impulsiveness and hyperactivity in childhood. Sig. = An independent T test significant.