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The (Spatial) Memory Game: Testing the Relationship Between Spatial Language, Object Knowledge, and Spatial Cognition
05:15

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Published on: February 19, 2018

Exploring the relationship between semantics and space.

Patrizia Turriziani1, Massimiliano Oliveri, Sonia Bonnì

  • 1Dipartimento di Psicologia, Università di Palermo, Palermo, Italy. p.turriziani@unipa.it

Plos One
|April 28, 2009
PubMed
Summary
This summary is machine-generated.

Human spatial attention biases affect semantic judgments, with items on the right being overestimated. Left parietal cortex stimulation reduced this rightward bias, revealing hemispheric specialization in semantic processing.

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Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Neuroscience

Background:

  • Human spatial attention exhibits asymmetric distribution in patients and healthy individuals.
  • Spatial attention biases may influence language processing, including semantic representations.
  • The role of parietal cortices in spatial attention and semantic processing is not fully understood.

Purpose of the Study:

  • To investigate if spatial attention biases affect semantic judgments.
  • To determine if semantic information location modulates semantic judgments.
  • To explore the role of left and right parietal cortices in spatial-semantic biases.

Main Methods:

  • Healthy subjects performed semantic judgments on horizontally arranged pictures.
  • Participants indicated spatial positions where semantic distance was perceived as smaller.
  • Repetitive transcranial magnetic stimulation (rTMS) targeted left and right parietal cortex.

Main Results:

  • Subjects systematically overestimated semantic distance for items presented on the right side of space.
  • rTMS applied to the left parietal cortex significantly reduced this rightward semantic bias.
  • No significant effect was observed with rTMS on the right parietal cortex.

Conclusions:

  • Semantic judgments are subject to attentional and/or mental representational biases, mirroring spatial and numerical processing.
  • The left hemisphere, specifically the left parietal cortex, plays a crucial role in modulating spatial biases in semantic judgments.
  • Spatial manipulation of semantic information engages specialized attentional resources predominantly in the left hemisphere.