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Related Concept Videos

Piaget's Stage 2 of Cognitive Development01:14

Piaget's Stage 2 of Cognitive Development

The preoperational stage, the second of Jean Piaget's four stages of cognitive development, spans approximately ages 2 to 7 and is characterized by the emergence of symbolic thinking. During this stage, children use language, images, and symbols to represent objects and concepts, enabling them to engage in imaginative and pretend play. This symbolic thinking supports children's ability to perform make-believe actions, such as imagining a broom as a horse or their hand as a phone, blending...
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Prefrontal cortex and the evolution of symbolic reference.

Andreas Nieder1

  • 1Department of Animal Physiology, University of Tuebingen, Tuebingen, Germany. andreas.nieder@uni-tuebingen.de

Current Opinion in Neurobiology
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Summary
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Numbers and language are key to human cognition. This study explores how animals, like primates, may develop symbolic number understanding from basic quantity recognition, offering insights into the evolution of symbol systems.

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Area of Science:

  • Cognitive Science
  • Neurobiology
  • Number Theory

Background:

  • Symbol systems, including numbers and language, are fundamental to human cognition.
  • Numerical competence develops through stages of referential sign relations: iconic, indexical, and symbolic.
  • Nonhuman primates primarily utilize indexical reference, lacking fully symbolic systems.

Purpose of the Study:

  • To investigate the precursors of symbol systems in animal cognition.
  • To elucidate the neurobiological basis of how numerical signs acquire meaning.
  • To explore semantic sign-numerosity associations in nonhuman primates.

Main Methods:

  • Analysis of numerical competence development across ontogeny.
  • Examination of indexical reference in nonhuman primates.
  • Neurobiological modeling of sign-numerosity associations.

Main Results:

  • Symbolic reference is proposed to emerge from indexical reference.
  • Behavioral and neuronal representations in animals can reveal symbol system precursors.
  • Neurons in the primate granular prefrontal cortex may link nonsymbolic numerosities with arbitrary signs.

Conclusions:

  • The granular prefrontal cortex plays a crucial role in higher-order associations for symbolic representation.
  • Understanding animal numerical cognition offers insights into the evolution of human symbolic systems.
  • A neurobiological framework is proposed for the emergence of numerical sign meaning.