Numerical and arithmetical cognition: a longitudinal study of process and concept deficits in children with learning disability.

@article{Geary2000NumericalAA,
  title={Numerical and arithmetical cognition: a longitudinal study of process and concept deficits in children with learning disability.},
  author={David C. Geary and Carmen O. Hamson and Mary K. Hoard},
  journal={Journal of experimental child psychology},
  year={2000},
  volume={77 3},
  pages={
          236-63
        }
}
Based on the stability and level of performance on standard achievement tests in first and second grade (mean age in first grade = 82 months), children with IQ scores in the low-average to high-average range were classified as learning disabled (LD) in mathematics (MD), reading (RD), or both (MD/RD). These children (n = 42), a group of children who showed variable achievement test performance across grades (n = 16), and a control group of academically normal peers (n = 35) were administered a… CONTINUE READING

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