Numerical Estimation in Preschoolers

Ilaria Berteletti, Daniela Lucangeli, Manuela Piazza, Stanislas Dehaene, Marco Zorzi

Research output: Contribution to journalArticlepeer-review


Children's sense of numbers before formal education is thought to rely on an approximate number system based on logarithmically compressed analog magnitudes that increases in resolution throughout childhood. School-age children performing a numerical estimation task have been shown to increasingly rely on a formally appropriate, linear representation and decrease their use of an intuitive, logarithmic one. We investigated the development of numerical estimation in a younger population (3.5- to 6.5-year-olds) using 0-100 and 2 novel sets of 1-10 and 1-20 number lines. Children's estimates shifted from logarithmic to linear in the small number range, whereas they became more accurate but increasingly logarithmic on the larger interval. Estimation accuracy was correlated with knowledge of Arabic numerals and numerical order. These results suggest that the development of numerical estimation is built on a logarithmic coding of numbers-the hallmark of the approximate number system-and is subsequently shaped by the acquisition of cultural practices with numbers.

Original languageEnglish
Pages (from-to)545-551
Number of pages7
JournalDevelopmental Psychology
Issue number2
Publication statusPublished - Mar 2010


  • number line
  • number representation
  • numerical development
  • numerical estimation

ASJC Scopus subject areas

  • Developmental and Educational Psychology
  • Life-span and Life-course Studies
  • Demography


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