subitize

1. (transitive, intransitive, psychology) To judge (the number of objects in a group) rapidly, accurately and confidently without counting them.Examples: "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 […]"; "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 […]"intransitivetransitive