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Related Experiment Videos

Direction specific costs to spatial working memory from saccadic and spatial remapping.

Brandon Vasquez1, James Danckert

  • 1Department of Psychology, University of Waterloo, Ontario, Canada.

Neuropsychologia
|April 29, 2008
PubMed
Summary
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Spatial remapping, whether saccadic or covert, impairs spatial working memory (SWM). Covert spatial remapping caused the largest SWM deficits, especially when remapping into right visual space.

Area of Science:

  • Cognitive Neuroscience
  • Neuropsychology

Background:

  • Right parietal lesions cause neglect, characterized by failure to attend to leftward stimuli.
  • Neglect models implicate attentional, spatial remapping, and spatial working memory (SWM) impairments.
  • Spatial remapping and SWM operate on different timescales but may interact.

Purpose of the Study:

  • To investigate the influence of saccadic and covert spatial remapping on SWM in healthy individuals.
  • To examine how different types of spatial remapping affect SWM performance.
  • To explore potential hemispheric biases in attention and space representation.

Main Methods:

  • Participants performed an SWM task with a 1500ms delay.
  • Conditions included a control (no remapping), saccadic remapping (fixation point movement), and covert spatial remapping (covert attention shifts).

Related Experiment Videos

  • Performance was measured by accuracy in identifying probe stimulus location relative to the original target location.

    • Main Results:

    • SWM performance was highest when no remapping was required.
    • Significant decrements in SWM were observed during both saccadic and covert spatial remapping.
    • Covert spatial remapping led to the largest SWM performance deficits.
    • A consistent cost was found for remapping into right visual space for both remapping types.

    Conclusions:

    • Spatial remapping processes, particularly covert spatial remapping, impose a significant cost on SWM.
    • Hemispheric biases in attention and differences in processing peripersonal versus extrapersonal space may underlie observed effects.
    • Findings contribute to understanding the interplay between attention, remapping, and memory in spatial cognition.