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Area of Science:

  • Cognitive psychology
  • Neurodevelopmental disorders
  • Mathematical cognition

Background:

  • The relationship between numerical cognition and other magnitudes is a key research area.
  • Automatic processing of magnitudes like area and perimeter is not well understood.
  • Developmental dyscalculia (DD) may involve broader cognitive deficits beyond number processing.

Purpose of the Study:

  • To investigate automatic processing of area and perimeter.
  • To determine if individuals with DD exhibit deficits in processing these magnitudes.
  • To examine the impact of exposure and magnitude type on automaticity in DD.

Main Methods:

  • A Stroop-like task was employed to assess automatic processing of area and perimeter.
  • Participants estimated one magnitude while ignoring the other.
  • Performance was measured after initial and continuous stimulus exposure in students with and without DD.

Main Results:

  • A significant group x congruency interaction indicated larger Stroop effects in the DD group.
  • During initial exposure, the DD group showed larger Stroop effects for perimeter, not area.
  • No triple interaction was observed during continuous exposure, suggesting practice effects.

Conclusions:

  • Both area and perimeter are automatically processed magnitudes.
  • Individuals with DD demonstrate a general deficit in inhibiting irrelevant magnitude information.
  • Specific difficulties in inhibiting salient area information emerge after initial perimeter tasks in DD, supporting broader cognitive deficits in DD.