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Related Experiment Videos

Digits affect actions: the SNARC effect and response selection.

Marwan Daar1, Jay Pratt

  • 1Department of Psychology, University of Toronto, Toronto, ON, Canada.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|April 5, 2008
PubMed
Summary
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The spatial-numerical association of response codes (SNARC) effect influences not only response speed but also response selection. Low numbers bias left-hand responses, while high numbers bias right-hand responses, impacting cognitive processing.

Area of Science:

  • Cognitive Psychology
  • Neuroscience

Background:

  • The spatial-numerical association of response codes (SNARC) effect demonstrates a link between numerical magnitude and spatial location.
  • Prior research suggests the SNARC effect may originate in the response selection stage of cognitive processing.

Purpose of the Study:

  • To investigate whether the SNARC effect influences response selection beyond response initiation speed.
  • To determine if numerical magnitude biases the choice of motor response.

Main Methods:

  • Participants were presented with low or high digits.
  • Participants then made a keypress response (left or right) based on personal comfort.
  • Response selection bias was measured based on digit magnitude.

Main Results:

Related Experiment Videos

  • Low digits significantly biased participants towards selecting left keypresses.
  • High digits significantly biased participants towards selecting right keypresses.
  • The SNARC effect was confirmed to influence response selection.

Conclusions:

  • The SNARC effect impacts both the speed and the selection of motor responses.
  • Numerical magnitude processing directly influences the choice of response, extending beyond simple reaction time modulation.