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The ability that both humans and animals could immediately perceive a small number of items in a pile—for instance, the sight of three red pens would trigger a sense of the number 3 just as it would produce a sense of the color red.
Although we seem to be hardwired with the number sense, however, this numerical instinct becomes unreliable once the number goes beyond five.
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by MathPlus June 13, 2018
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The ability that both humans and animals could immediately perceive a small number of items in a pile—for instance, the sight of three red pens would trigger a sense of the number 3 just as they would produce a sense of the color red.
Although we seem to be hardwired with the number sense, however, this numerical instinct becomes unreliable once the number goes beyond five.
via giphy
by MathPlus June 13, 2018
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