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Serial dependence: A matter of memory load.

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Summary
This summary is machine-generated.

Serial dependence, the bias towards recent stimuli, is significantly modulated by visual working memory (VWM) resources. High current VWM load strengthens past influences, while high prior VWM load weakens them.

Keywords:
Memory loadPerceptual historySerial biasesSerial dependenceVisual working memory

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Area of Science:

  • Cognitive Neuroscience
  • Perception and Psychophysics
  • Human Behavior

Background:

  • Serial dependence describes how recent sensory information influences current perceptual decisions.
  • The role of cognitive resources, such as visual working memory (VWM), in modulating serial dependence remains incompletely understood.

Purpose of the Study:

  • To investigate how the availability of VWM resources affects serial dependence.
  • To determine if VWM load influences the strength of serial dependence in perceptual tasks.

Main Methods:

  • Two experiments involved participants reproducing stimulus orientations.
  • An additional visual working memory (VWM) task with varying load levels was interleaved with the main task.
  • Serial dependence and reproduction precision were analyzed in relation to VWM load conditions.

Main Results:

  • Serial dependence was modulated by VWM load: high load in the preceding trial reduced serial dependence.
  • Conversely, high VWM load in the current trial increased serial dependence.
  • These effects were distinct from VWM load's impact on the precision of response reproduction.

Conclusions:

  • VWM resources play a critical role in regulating serial dependence.
  • The findings reveal an intimate link between VWM capacity and the influence of recent past stimuli on present perception.
  • This suggests dynamic interplay between memory systems and perceptual processing.