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Related Experiment Videos

Interference processes in monkey auditory list memory.

Anthony A Wright1, Henry L Roediger

  • 1Department of Neurobiology and Anatomy, University of Texas Health Science Center, Houston, Texas 77225, USA. Anthony.A.Wright@uth.tmc.edu

Psychonomic Bulletin & Review
|November 19, 2003
PubMed
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Rhesus monkeys showed impaired memory for list items due to proactive and retroactive interference. Interference effects diminished over time, revealing recency effects in sound memory.

Area of Science:

  • Cognitive Neuroscience
  • Primate Memory Research
  • Auditory Perception

Background:

  • Understanding memory recall in non-human primates is crucial for comparative psychology.
  • Serial position effects, like recency and primacy, are fundamental concepts in memory research.
  • Investigating interference processes provides insights into memory limitations.

Purpose of the Study:

  • To examine memory performance for single auditory items versus four-item lists in rhesus monkeys.
  • To investigate the roles of proactive and retroactive interference in auditory list memory.
  • To analyze the impact of retention delay on serial position effects.

Main Methods:

  • Rhesus monkeys were trained to discriminate between studied and novel sounds.

Related Experiment Videos

  • Auditory stimuli (natural and environmental sounds) were presented centrally, followed by a delay.
  • A two-alternative forced choice task assessed recognition of list items from side speakers.

    • Main Results:

    • Memory for the last item in four-item lists was significantly impaired at short delays (0-2s) due to proactive interference.
    • Proactive interference decreased after 2 seconds, revealing a recency effect comparable to single-item memory.
    • Memory for the first item in four-item lists was impaired at longer delays (20-30s) due to retroactive interference.

    Conclusions:

    • Interference processes, both proactive and retroactive, critically shape serial position functions in rhesus monkey auditory memory.
    • The findings highlight the dynamic interplay between interference and recency effects depending on retention interval.
    • This study contributes to understanding the fundamental mechanisms of memory in primates.