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The Illusions of Numerosity
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Abstract
The illusions of numerosity can be broadly divided into two main categories (a) illusions of numerosity that can be observed in many classical illusions of linear or area extent just replacing the uninterrupted lines by rows of dots, or putting the elements to judge in the area, and (b) illusions in which the participants are clearly aware that the numbers of the elements to estimate are equal in two patterns, but despite this fact they judge that the elements in one pattern are “more” than in the other. Using a constant stimuli method both length/area and numerosity illusions move in the same direction, whereas using a magnitude estimation method the illusions disappear or move in opposite direction. All of this suggests the existence of at least two different cognitive mechanisms at the basis of this phenomenon.
Title: The Illusions of Numerosity
Description:
Abstract
The illusions of numerosity can be broadly divided into two main categories (a) illusions of numerosity that can be observed in many classical illusions of linear or area extent just replacing the uninterrupted lines by rows of dots, or putting the elements to judge in the area, and (b) illusions in which the participants are clearly aware that the numbers of the elements to estimate are equal in two patterns, but despite this fact they judge that the elements in one pattern are “more” than in the other.
Using a constant stimuli method both length/area and numerosity illusions move in the same direction, whereas using a magnitude estimation method the illusions disappear or move in opposite direction.
All of this suggests the existence of at least two different cognitive mechanisms at the basis of this phenomenon.
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