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A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss
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A bilateral advantage in controlling access to visual short-term memory.

Jessica L Holt1, Jean-François Delvenne1

  • 1Institute of Psychological Sciences, University of Leeds, <location>UK</location>

Experimental Psychology
|August 31, 2013
PubMed
Summary

Visual short-term memory (VSTM) shows a bilateral field advantage (BFA) for some features but not color. This study found that VSTM color memory benefits from bilateral presentation only when attention is engaged by irrelevant stimuli.

Keywords:
attentionbilateral field advantagevisual short-term memoryvisual working memory

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Visual short-term memory (VSTM) research indicates a bilateral field advantage (BFA) for spatial location and bar orientation, but not color.
  • The BFA, where memory is better with items across visual fields, has been linked to selective attention processes.

Purpose of the Study:

  • To investigate if attentional selective processes constrain the bilateral field advantage (BFA) in visual short-term memory (VSTM) for color.
  • To determine if VSTM for color benefits from bilateral presentation when attentional demands are heightened.

Main Methods:

  • Participants performed a color change detection task with stimuli presented either bilaterally or unilaterally.
  • Attentional selective processes were engaged by including irrelevant stimuli that required ignoring.
  • Target stimuli were identified by spatial location (Experiment 1) or a salient feature (Experiment 2).

Main Results:

  • A bilateral field advantage (BFA) for color in VSTM was observed exclusively when irrelevant stimuli were present alongside targets.
  • This effect occurred regardless of whether targets were selected by spatial location or a salient feature.

Conclusions:

  • Attentional selective processes play a crucial role in determining the occurrence of a bilateral field advantage (BFA) in visual short-term memory (VSTM).
  • The findings suggest that the BFA for color in VSTM is not automatic but depends on the engagement of attentional mechanisms during encoding.