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To subitize is to identify the number of things in a set simply by quickly looking at them—not by counting them one by one.

The practice of subitizing has its roots in psychology, but it is now taught in some preschools and early grades in addition to traditional counting.

Example: Humans can subitize up to seven objects at once without having to count.

Subitize was introduced in a 1949 journal article by a research team led by psychologist E. L. Kaufman, who credited language professor Cornelia Coulter with coining it. It is most likely formed from a combination of the Latin subit(us), meaning “sudden” (or the Late Latin ���ܲ�����(�����), meaning “to appear suddenly”), and the suffix -ize, which is used to create verbs.

Subitizing has been studied at length and most results show that humans can subitize up to seven items in a single glance. This is done by grouping the objects into sets (of three and four, for example) and then adding those sets together mentally. In the early 1900s, many scholars theorized that subitizing could be more efficient than counting, especially for young children. Substantial research supports the idea that children are very good at subitizing early in life and can even do it before they can count in some cases. However, some research suggests that subitization is more commonly used by children as a method of speeding up the counting process after basic counting has already been learned. Still, children are often taught to subitize in many schools.

What are some other forms of subitize?

• subitization (noun)

What are some words that share a root or word element with subitize?��

• subito

What are some words that often get used in discussing subitize?

• count
• analyze
• collection
• unit
• set
• chunking

The word subitize is often used in academic and theoretical contexts, but subitizing is also taught to schoolchildren with fun activities and �������t¶��.

Apps like this enable us to move beyond counting in 1s. Children learn to subitize numbers like 8 as 5 and…or 8 as 10 with…missing

— bernie westacott (@berniewestacott)

We are learning to subitize! We can quickly identify the number in a set without counting!👍🏼

— Mrs Harkins/Dornan P2H/D (@HarkinsMrs)

Roll and record with different dice! Roll, subitize and record by printing the number on your paper. Which number rolls the most?

— Deanna McLennan Ph.D (@McLennan1977)

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True or false?

Subitizing is the same as counting, just faster.