Across-notation automatic processing of two-digit numbers

Dana Ganor-Stern, Joseph Tzelgov

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


The existence of across-notation automatic numerical processing of two-digit (2D) numbers was explored using size comparisons tasks. Participants were Arabic speakers, who use two sets of numerical symbols - Arabic and Indian. They were presented with pairs of 2D numbers in the same or in mixed notations. Responses for a numerical comparison task were affected by decade difference and unit-decade compatibility and global distance in both conditions, extending previous findings with Arabic digits (Nuerk, Weger, & Willmes, 2001). Responses for a physical comparison task were affected by congruency with the numerical size, as indicated by the size congruency effect (SiCE). The SiCE was affected by unit-decade compatibility but not by global distance, thus suggesting that the units and decades digits of the 2D numbers, but not the whole number value were automatically translated into a common representation of magnitude. The presence of similar results for same-and mixed-notation pairs supports the idea of an abstract representation of magnitude.

Original languageEnglish
Pages (from-to)147-153
Number of pages7
JournalExperimental Psychology
Issue number2
StatePublished - 7 Mar 2011


  • Numerical processing
  • Numerical processing across notations
  • Two-digit numbers

ASJC Scopus subject areas

  • Experimental and Cognitive Psychology
  • Arts and Humanities (miscellaneous)
  • Psychology (all)


Dive into the research topics of 'Across-notation automatic processing of two-digit numbers'. Together they form a unique fingerprint.

Cite this