Count Me In! On the Automaticity of Numerosity Processing

Sharon Naparstek, Avishai Henik

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


Extraction of numerosity (i.e., enumeration) is an essential component of mathematical abilities. The current study asked how automatic is the processing of numerosity and whether automatic activation is task dependent. Participants were presented with displays containing a variable number of digits and were asked to pay attention to the number of digits or to their numerical value, in separate blocks. Effects of task were tested with a comparative judgment task and a parity judgment task. In the comparative judgment task, participants had to indicate whether the numerosity or the numerical value of the digits was smaller or larger than 5. In the parity judgment task, participants had to indicate whether this value was odd or even. Irrelevant numerical values modulated performance regardless of task. In contrast, irrelevant numerosities modulated performance only in the comparative judgment task. These results suggest that numerical value is activated automatically, whereas activation of numerosity is modulated by task. We suggest that the differences observed are related to different cognitive and neural mechanisms recruited by these tasks.

Original languageEnglish
Pages (from-to)1053-1059
Number of pages7
JournalJournal of Experimental Psychology: Learning Memory and Cognition
Issue number4
StatePublished - 1 Jul 2010


  • Counting
  • Numerical value
  • Numerosity
  • Stroop
  • Subitizing

ASJC Scopus subject areas

  • Language and Linguistics
  • Experimental and Cognitive Psychology
  • Linguistics and Language


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