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"Cardinal Number" - Children's Understanding of Numerosity [Research Toy]

Last updated on March 8, 2017 - 8:16am

This activity explores when children come to understand that the amount of things represented in a set are associated with a particular number word - a concept known as the "cardinal number principle".

Click to download resources:

  • Cardinal Number Interpretation Guide
  • [paper] Six Does Not Just Mean a Lot: Preschoolers See Number Words as Specific

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The National Living Lab Initiative is supported by a grant to the Museum of Science, Boston from the National Science Foundation under Award Number 1113648.

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