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The act of perceiving quantity without actually counting is known as subitizing, and it's something we can all do up to quantities of about 4 (i.e. you can tell how many fingers someone is holding up without counting them, right?). This open access article seems to review the idea quite nicely (although I've only skimmed it), including reference to so ...


This is typical of a group of people that have what is properly known as savant syndrome. It is not limited to autistic people, although it is most prevalent among them. People that display these abilities are usually elevated on the autism scale, and have had some sort of traumatic brain injury or neurodevelopmental disorders. Unfortunately, the methods by ...

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