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Table 4 Correlations (reaction time) 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 = -0.192 r = -0.201 r = -0.168 r = -0.129 r = -0.017 r = 0.234
  P = 0.268 P = 0.247 P = 0.334 P = 0.459 P = 0.921 P = 0.176
Space    r = -0.036 r = 0.284 r = 0.134 r = 0.165 r = -0.214
   P = 0.846 P = 0.099 P = 0.443 P = 0.344 P = 0.218
Number
(OTS)
    r = 0.522 r = 0.599 r = 0.377 r = 0.124
    P = 0.001** P < 0.001*** P = 0.026 * P = 0.479
Number      r = 0.391 r = 0.449 r = -0.017
(ANS)      P = 0.020 * P = 0.007 ** P = 0.921
Mental calculation       r = 0.408 r = -0.117
      P = 0.015 * P = 0.502
Mathematical reasoning        r = -0.317
        P = 0.064
  1. Data of non-symbolic estimation of time, space and number (ANS) refer to all the ratios.