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    • Exact Equality and Successor Function: Two Key Concepts on the Path Towards Understanding Exact Numbers 

      Izard, Véronique; Pica, Pierre; Spelke, Elizabeth S.; Dehaene, Stanislas (Taylor & Francis, 2008)
      Humans possess two nonverbal systems capable of representing numbers, both limited in their representational power: the first one represents numbers in an approximate fashion, and the second one conveys information about ...
    • Newborn Infants Perceive Abstract Numbers 

      Izard, Véronique; Sann, Coralie; Spelke, Elizabeth S.; Streri, Arlette (National Academy of Sciences, 2009)
      Although infants and animals respond to the approximate number of elements in visual, auditory, and tactile arrays, only human children and adults have been shown to possess abstract numerical representations that apply ...