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Sequences are fundamental mathematical objects consisting of ordered lists of numbers that follow a specific rule or pattern. Sequences are critical in various mathematical concepts, including calculus, series, and number theory. They can model real-world phenomena such as population growth, financial investments, and physical processes like the diminishing height of a bouncing ball.Each number in a sequence is referred to as a term. Typically, the terms are denoted as a1, a2, a3,…, where...
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Human infants' preference for left-to-right oriented increasing numerical sequences.

Maria Dolores de Hevia1, Luisa Girelli2, Margaret Addabbo2

  • 1Université Paris Descartes, Laboratoire Psychologie de la Perception, CNRS, UMR 8158, Paris, France; Cognitive NeuroImaging Unit, NeuroSpin, INSERM, U992, Saclay, France.

Plos One
|May 8, 2014
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Summary
This summary is machine-generated.

Preverbal infants show an innate preference for linking numerical magnitude with left-to-right spatial orientation. This suggests a foundational, non-symbolic basis for the number-space association in humans.

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Area of Science:

  • Cognitive psychology
  • Developmental psychology
  • Neuroscience

Background:

  • The number-space association, a spatially oriented numerical representation, is well-documented in adults.
  • Its origins are debated, with theories suggesting cultural invention, symbolic knowledge, and mathematics education as key factors.

Purpose of the Study:

  • To investigate the origins of the number-space association in preverbal infants.
  • To determine if this association precedes symbolic abilities and formal education.

Main Methods:

  • Habituation paradigm with 7-month-old infants lacking symbolic knowledge.
  • Presentation of increasing/decreasing numerical sequences in left-to-right and right-to-left orientations.
  • Measurement of infant looking time as an indicator of preference.

Main Results:

  • Infants habituated to left-to-right sequences showed a preference for increasing numerical sequences in the same orientation.
  • This preference was not observed when sequences were presented from right to left.
  • Results indicate a context-dependent baseline preference for increasing, left-to-right numerosities.

Conclusions:

  • Preverbal infants exhibit an early predisposition to associate numerical order with left-to-right spatial orientation.
  • This innate link likely precedes the development of symbolic abilities, mathematics education, and literacy skills.
  • Findings challenge the notion that the number-space association is solely a product of human invention.