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Eye Movement Monitoring of Memory
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Saccadic eye movements smear spatial working memory.

Matthew S Peterson1, Shane P Kelly1, Eric J Blumberg1

  • 1Department of Psychology.

Journal of Experimental Psychology. Human Perception and Performance
|December 28, 2018
PubMed
Summary
This summary is machine-generated.

Eye movements called saccades disrupt spatial working memory more than attention shifts. This study suggests saccadic remapping, a process during eye movements, partially explains this interference with spatial memory precision.

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Area of Science:

  • Cognitive Neuroscience
  • Experimental Psychology

Background:

  • Saccades, or rapid eye movements, are known to interfere with spatial working memory.
  • The precise mechanisms underlying this interference, especially compared to covert attentional shifts, remain unclear.

Purpose of the Study:

  • To investigate the role of saccadic remapping in the interference between saccades and spatial working memory.
  • To differentiate the effects of saccades from covert attentional shifts on spatial memory representations.

Main Methods:

  • A spatial change detection task was employed.
  • Participants performed a central task, a peripheral task without eye movement, or a peripheral task requiring a saccade during the retention interval.
  • Psychophysical functions were fitted using the method of constant stimuli to derive measures of memory precision, guessing, and response bias.

Main Results:

  • A directionally specific loss of memory precision was observed along the axis of the saccade.
  • Saccades led to a greater loss of precision than covert attentional shifts.
  • Saccades also increased guessing in a nondirectional manner.

Conclusions:

  • Saccadic remapping contributes to the interference of saccades with spatial working memory.
  • The findings highlight the specific impact of eye movements on the precision of spatial memory representations.