Developmental trajectory of number acuity reveals a severe impairment in developmental dyscalculia

@article{Piazza2010DevelopmentalTO,
  title={Developmental trajectory of number acuity reveals a severe impairment in developmental dyscalculia},
  author={Manuela Piazza and Andrea Facoetti and Anna Noemi Trussardi and I. Berteletti and Marco Zorzi},
  journal={Cognition},
  year={2010},
  volume={116},
  pages={33-41}
}
Developmental dyscalculia is a learning disability that affects the acquisition of knowledge about numbers and arithmetic. It is widely assumed that numeracy is rooted on the "number sense", a core ability to grasp numerical quantities that humans share with other animals and deploy spontaneously at birth. To probe the links between number sense and dyscalculia, we used a psychophysical test to measure the Weber fraction for the numerosity of sets of dots, hereafter called number acuity. We… CONTINUE READING
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