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Basic number processing, like understanding number magnitude, is influenced by cognitive control. Task switching reveals that changes in input-output compatibility actively affect numerical distance effects.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Cognitive Control Research

Background:

  • Basic numerical cognition, including number magnitude processing, is increasingly understood to be under cognitive control.
  • Prior evidence primarily relied on adaptation effects from stimulus characteristics.
  • A gap exists in understanding the impact of actively exerted cognitive control on basic number processing.

Purpose of the Study:

  • To investigate the influence of active cognitive control exertion on basic number processing.
  • To examine how task switching, specifically manipulating input-output modality compatibility, affects number magnitude comparison.

Main Methods:

  • Participants performed a number magnitude comparison task.
  • Task switching paradigm was employed, manipulating trial-level input-output modality compatibility (compatible vs. incompatible).
  • Differentiated between repeat and switch trials to assess cognitive control demands.

Main Results:

  • The numerical distance effect was significantly increased following a switch in input-output modality compatibility.
  • The problem size effect did not show a significant change after modality compatibility switches.
  • This suggests differential modulation of number processing components by cognitive control.

Conclusions:

  • Basic number processing is indeed under cognitive control.
  • Provides the first evidence that active exertion of cognitive control, as in task switching, influences basic number processing.
  • Highlights the role of cognitive control in modulating numerical cognition beyond passive adaptation.