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Multimedia Battery for Assessment of Cognitive and Basic Skills in Mathematics (BM-PROMA)
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Published on: August 28, 2021

Arithmetic priming from neglected numbers.

Elena Rusconi1, Konstantinos Priftis, Maria Luisa Rusconi

  • 1Institute of Cognitive Neuroscience, University College London, UK.

Cognitive Neuropsychology
|November 5, 2010
PubMed
Summary
This summary is machine-generated.

Visuospatial neglect does not prevent number processing, even for ignored stimuli. Neglected numbers accessed arithmetic knowledge, showing automatic processing and supporting theories on attention and inhibition.

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Area of Science:

  • Cognitive Neuroscience
  • Experimental Psychology
  • Neuroscience

Background:

  • Visuospatial neglect is a cognitive disorder affecting spatial attention.
  • The processing of unattended information in neglect is a key area of research.
  • Automaticity of numerical cognition is debated, especially in clinical populations.

Purpose of the Study:

  • To investigate the processing of neglected numbers in a patient with left visuospatial neglect.
  • To examine whether arithmetic knowledge is accessed for stimuli in the neglected visual field.
  • To explore the relationship between attention, inhibition, and numerical processing.

Main Methods:

  • A parity judgment task was administered to one patient with left visuospatial neglect (AM) and 31 healthy controls.
  • Number primes were presented peripherally in the left visual field (LVF) or right visual field (RVF) before target numbers.
  • Reaction times were measured to assess the effect of arithmetically related vs. unrelated primes.

Main Results:

  • Healthy participants showed slower performance with arithmetically related primes.
  • Patient AM exhibited slower performance with related primes in the RVF (attended field).
  • Patient AM showed faster performance with related primes in the LVF (neglected field).

Conclusions:

  • Visuospatial neglect does not impede the processing of neglected numbers to the level of stored arithmetic knowledge.
  • Numerical processing appears to be a highly automatised skill, accessible even when attention is withdrawn.
  • The pattern of interference (RVF) and facilitation (LVF) in patient AM supports a link between conscious attention and inhibitory control mechanisms.