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The organization of spatial reference frames involved in the SNARC effect.

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The Spatial Numerical Association of Response Codes (SNARC) effect is influenced by spatial reference frames. Focusing on a hand-based frame eliminated the SNARC, supporting a dynamic, hierarchical model of spatial representation.

Keywords:
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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Spatial Cognition

Background:

  • The Spatial Numerical Association of Response Codes (SNARC) effect links number magnitude to spatial responses.
  • The specific spatial reference frames (e.g., global, body-based, object-based) underlying the SNARC effect remain unclear.

Purpose of the Study:

  • To investigate the role of different spatial reference frames in modulating the SNARC effect.
  • To test a proposed dynamic hierarchical model of spatial reference frames.

Main Methods:

  • Two experiments were conducted manipulating attentional focus on different reference frames.
  • Experiment 1 contrasted button-based versus hand-based spatial attention.
  • Experiment 2 explored the influence of an object-centered reference frame.

Main Results:

  • Instructions emphasizing a hand-based reference frame abolished the SNARC effect.
  • An object-centered reference frame did not directly influence the SNARC, but other frames were affected in this context.

Conclusions:

  • The findings support a dynamic, hierarchical organization of spatial reference frames influencing the SNARC effect.
  • The influence of specific reference frames is context-dependent and can be modulated by experimental instructions.