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Interference effects between memory systems in the acquisition of a skill.

Marie-Hélène Gagné1,2, Henri Cohen3,4

  • 1Department of Psychology, Université du Québec à Montréal, CP 8888, succursale Centre-ville, Montreal, QC, H3C 3P8, Canada.

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Summary

Declarative memory tasks can interfere with motor skill recall, even after learning. Introducing a visuospatial task before retrieval eliminated performance gains, suggesting memory system interference during recall.

Keywords:
Declarative learningHippocampusInterferenceMemory systemsMotor sequence learningOffline gainsProcedural learning

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Motor Learning

Background:

  • Declarative (hippocampus-dependent) and procedural (striatum-dependent) memory systems interact during sequential motor learning.
  • Competition for neural resources can cause interference between these memory systems during learning and consolidation.

Purpose of the Study:

  • To investigate interference effects between declarative and procedural memory systems during the retrieval phase of motor skill learning.
  • To determine if declarative tasks impair motor skill recall and eliminate offline performance gains.

Main Methods:

  • Healthy participants trained on a finger-to-sequence (FOS) task.
  • Participants were assigned to a control group or a declarative (visuospatial) task condition.
  • Performance on the FOS task was assessed immediately after training and 24 hours later, with the declarative group performing the visuospatial task before recall.

Main Results:

  • Both groups showed similar initial learning of the FOS task.
  • Only the control group exhibited additional offline performance gains 24 hours later.
  • Performing a visuospatial task before motor skill retrieval eliminated offline gains in the declarative group.

Conclusions:

  • Interference between declarative and procedural memory systems can occur during motor skill retrieval, not just learning or consolidation.
  • The spatial nature of both motor and declarative tasks, relying on hippocampal involvement, may underlie these interference effects.
  • These findings highlight the dynamic interplay and potential competition between different memory systems during skill recall.