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Related Experiment Videos

Automatic response activation of implicit spatial information: Evidence from the SNARC effect.

Wim Gevers1, Jan Lammertyn, Wim Notebaert

  • 1Department of Experimental Psychology, Ghent University, H. Dunantlaan 2, 9000 Gent, Belgium. Wim.Gevers@Ugent.be

Acta Psychologica
|January 21, 2006
PubMed
Summary

Irrelevant spatial information from number magnitude, like in the SNARC task, can automatically influence behavior. This interference depends on how response keys are arranged horizontally or vertically.

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Area of Science:

  • Cognitive psychology
  • Human-computer interaction
  • Neuroscience

Background:

  • The SNARC (Spatial Numerical Association of Response Codes) effect demonstrates how number magnitude, irrelevant to a task, activates spatial codes.
  • These spatial associations can interfere with task performance, influencing response selection.
  • Such effects are observed in both horizontal and vertical spatial dimensions.

Purpose of the Study:

  • To investigate the processing of irrelevant implicit spatial information.
  • To examine how the spatial numerical associations of response codes (SNARC) effect is modulated by response key discrimination.
  • To determine if horizontal and vertical spatial dimensions interact when both are task-relevant.

Main Methods:

  • Experiment 1: Participants performed tasks with response keys discriminating either horizontally or vertically.

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  • Experiment 2: Participants performed tasks with response keys discriminating in both horizontal and vertical dimensions.
  • Analysis focused on the behavioral impact of irrelevant numerical spatial codes.

    • Main Results:

    • The influence of automatic spatial codes on behavior is dependent on whether the response discrimination is horizontal or vertical.
    • When both horizontal and vertical dimensions were discriminating, interactions between these dimensions were observed.
    • These findings support the response-discrimination account of cognitive effects.

    Conclusions:

    • Irrelevant spatial information processing is influenced by the task's response requirements.
    • The interplay between numerical magnitude and spatial response dimensions is complex and context-dependent.
    • The response-discrimination account provides a useful framework for understanding such cognitive phenomena.