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Table 3 Correlations (accuracy) among the tasks (* = p < 0.05; ** = p < 0.01; *** = p < 0.001)

From: Individual differences in non-symbolic numerical abilities predict mathematical achievements but contradict ATOM

  Non-symbolic magnitude estimation Symbolic numerical task Control task
  Time Space Number Number Mental Mathematical Stroop test
    (OTS) (ANS) Calculation Reasoning  
Time   r = -0.178 r = -0.141 r = 0.278 r = 0.179 r = 0.049 r = -0.074
   P = 0.307 P = 0.418 P = 0.106 P = 0.304 P = 0.782 P = 0.674
Space    r = 0.112 r = -0.263 r = -0.120 r = -0.020 r = 0.033
   P = 0.520 P = 0.126 P = 0.493 P = 0.910 P = 0.850
Number
(OTS)
    r = 0.048 r = 0.480 r = 0.368 r = 0.195
    P = 0.785 P = 0.003 ** P = 0.030 * P = 0.262
Number
(ANS)
     r = 0.463 r = 0.489 r = -0.045
     P = 0.005 ** P = 0.003 ** P = 0.799
Mental calculation       r = 0.566 r = 0.156
      P < 0.001 *** P = 0.371
Mathematical reasoning        r = 0.010
        P = 0.954
  1. Data of non-symbolic estimation of time, space and number (ANS) refer to the five highest ratios.