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Table 2 Mean chronological age, non-verbal intelligence and reading age for the four groups compared

From: Parietal function in good and poor readers

Group No. Chronological Age Non-Verbal Mentation (Ravens IQ) Reading age
   M SE M SE M SE
DD 17 11.7 0.4 95 2 7.6 0.3
CA[L] 16 11.4 0.2 93 1 12.3** 0.3
CA[H] 16 11.8 0.2 118** 1 13.4** 0.5
RA 16 8.1 0.1 106* 3 8.5 0.4
  1. DD = developmental dyslexia; CA[L] = Chronological age matched, low IQ; CA[H] = Chronological age matched, high IQ; RA = reading age matched.
  2. Symbols denote significantly different from DD group.
  3. (* = p < .01; ** = p < .0001).