Editing Subitizing (section)

==Other applications==

One of the most basic applications is in [[Decimal mark#Digit grouping|digit grouping]] in large numbers, which allow one to tell the size at a glance, rather than having to count. For example, writing one million (1000000) as 1,000,000 (or 1.000.000 or {{val|1000000}}) or one ([[Long and short scales|short]]) billion (1000000000) as 1,000,000,000 (or other forms, such as 1,00,00,00,000 in the [[Indian numbering system]]) makes it much easier to read. This is particularly important in accounting and finance, as an error of a single decimal digit changes the amount by a factor of ten. This is also found in computer [[programming language]]s for [[Literal (computer programming)|literal]] values, some of which use [[Integer literal#Digit separators|digit separators]].

[[Dice]], [[playing cards]] and other gaming devices traditionally split quantities into subitizable groups with recognizable patterns. The behavioural advantage of this grouping method has been scientifically investigated by Ciccione and [[Dehaene]],<ref>{{Cite journal |author1=Ciccione, L. |author2=Dehaene, S. |name-list-style=amp |year=2020 |title=Grouping mechanisms in numerosity perception |journal=Open Mind |volume=4 |pages=102–118 |doi=10.1162/opmi_a_00037  |issue=1|pmid=34485793 |pmc=8412191 |doi-access=free }}</ref> who showed that counting performances are improved if the groups share the same amount of items and the same repeated pattern.

A comparable application is to split up binary and hexadecimal number representations, telephone numbers, bank account numbers (e.g., [[IBAN]], social security numbers, number plates, etc.) into groups ranging from 2 to 5 digits separated by spaces, dots, dashes, or other separators. This is done to support overseeing completeness of a number when comparing or retyping. This practice of grouping characters also supports easier memorization of large numbers and character structures.