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Sequential Effects in SNARC.

Dinis Gökaydin1, Peter Brugger2, Tobias Loetscher3

  • 1School of Psychology, Social Work and Social Policy, University of South Australia, Adelaide, Australia. dgokaydin@gmail.com.

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Summary
This summary is machine-generated.

Number-space associations, known as the SNARC effect, can invert when previous trials are incongruent. This study reveals how prior experiences influence spatial-numerical cognition, suggesting universal sequence processing mechanisms.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human-Computer Interaction

Background:

  • The Spatial-Numerical Association of Response Codes (SNARC) effect describes the common association of small numbers with left space and large numbers with right space.
  • Understanding factors influencing SNARC is crucial for cognitive models of numerical processing and spatial cognition.

Purpose of the Study:

  • To investigate the impact of preceding trials on the SNARC effect.
  • To explore the role of working memory in spatial-numerical associations.
  • To model sequential effects in SNARC using established signal processing techniques.

Main Methods:

  • An online Spatial-Numerical Association of Response Codes (SNARC) paradigm was administered to 604 participants.
  • Analysis focused on how the congruency and sequence of previous trials affected number-space mappings.
  • Sequential effects were modeled using an exponential filter.

Main Results:

  • A significant inversion of number-space associations (left/large, right/small) was observed following incoherent trials.
  • Trial congruency beyond the immediate preceding trial was found to influence SNARC.
  • Sequential effects in SNARC were effectively captured by an exponential filter.

Conclusions:

  • Prior trial history, particularly incongruent responses, strongly modulates spatial-numerical associations.
  • Findings support working memory models of spatial-numerical associations and highlight the influence of trial sequences.
  • The study suggests that universal mechanisms govern sequence processing across perception and cognition.