A Two-Minute Paper-and-Pencil Test of Symbolic and Nonsymbolic Numerical Magnitude Processing Explains Variability in Primary School Children's Arithmetic Competence

• Nadia Nosworthy,

  Affiliation Numerical Cognition Laboratory, Department of Psychology, University of Western Ontario, London, Ontario, Canada

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• Stephanie Bugden,

  Affiliation Numerical Cognition Laboratory, Department of Psychology, University of Western Ontario, London, Ontario, Canada

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• Lisa Archibald,

  Affiliation School of Communications Sciences and Disorders, Department of Psychology, University of Western Ontario, London, Ontario, Canada

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• Barrie Evans,

  Affiliation Psychological Services, Thames Valley District School Board, London, Ontario, Canada

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• Daniel Ansari

  * E-mail: daniel.ansari@uwo.ca

  Affiliation Numerical Cognition Laboratory, Department of Psychology, University of Western Ontario, London, Ontario, Canada

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