subitize

present singular third person subitizes · participle present subitizing · participle past subitized · past subitized · alternative UK subitise

1. intransitivetransitivehuman sciencesTo judge (the number of objects in a group) rapidly, accurately and confidently without counting them.First known use 1949

   When students subitize, they know how many because the arrangement is familiar and/or friendly. While recent information about the benefits of teaching subitizing has surfaced (Clements, 1999), early use of the term appeared more than […]

   2016, Jennifer Taylor-Cox, Math Intervention P–2: Building Number Power with Formative Assessments, Differentiation, and Games, Grades PreK–2, Routledge, →ISBN, page 52

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   Previous researchers have noted a similarity between the set sizes that adults can estimate rapidly, or subitize, and the set sizes that infants can discriminate: both are less than five items. This similarity has led some to suggest that subitizing is […]

   2002, Kelly S. Mix, Janellen Huttenlocher, Susan Cohen Levine, Quantitative Development in Infancy and Early Childhood, Oxford University Press, →ISBN, page 47