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Parallel memory retrieval in dual-task situations: II. Episodic memory.

G D Logan1, J A Delheimer

  • 1Department of Psychology, Vanderbilt University, Nashville, Tennessee 37240, USA. gordon.logan@vanderbilt.edu

Journal of Experimental Psychology. Learning, Memory, and Cognition
|June 8, 2001
PubMed
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This study on memory retrieval found that people can access information from two stimuli simultaneously. Priming effects suggest parallel processing, not step-by-step retrieval, in human memory.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Memory Research

Background:

  • Understanding the mechanisms of human memory retrieval is crucial for cognitive science.
  • Previous models proposed discrete serial retrieval, but evidence for parallel processing is growing.

Purpose of the Study:

  • To investigate whether information can be retrieved from two stimuli concurrently.
  • To examine the temporal dynamics of stimulus processing during memory retrieval.
  • To differentiate between serial and parallel retrieval models.

Main Methods:

  • Three experiments involved recognition judgments on word pairs presented at varying stimulus onset asynchronies (0, 250, 1000 ms or 0, 300 ms).
  • Participants responded to whether words were targets (on study list) or lures (not on study list).

Related Experiment Videos

  • Reaction times were analyzed based on stimulus type (target/lure) and study-list memory structure (columns, pairs, sentences).

    • Main Results:

    • Reaction times were faster when both stimuli were targets or both were lures compared to mixed target-lure pairs.
    • Priming effects were observed from the second stimulus to the first when both were targets.
    • Faster reaction times for the first stimulus occurred when targets originated from the same memory structure at study.

    Conclusions:

    • The findings support a parallel retrieval model of memory, where information from multiple stimuli can be accessed simultaneously.
    • The observed priming effects and reaction time patterns are inconsistent with discrete serial retrieval processes.
    • Memory organization at study influences the efficiency of parallel retrieval.