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Related Experiment Videos

Auditory list memory and interference processes in monkeys.

A A Wright1

  • 1Department of Neurobiology and Anatomy, University of Texas Medical School, Houston 77225, USA. aawright@nba19.med.uth.tmc.edu

Journal of Experimental Psychology. Animal Behavior Processes
|July 29, 1999
PubMed
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Memory recall in rhesus monkeys depends on sound list interference. Interference impacts primacy and recency effects, influencing how animals remember sound sequences.

Area of Science:

  • Cognitive Psychology
  • Animal Behavior
  • Neuroscience

Background:

  • Understanding memory processes, including primacy and recency effects, is crucial for cognitive science.
  • Investigating memory in non-human primates offers insights into the evolution and fundamental mechanisms of memory.
  • The role of interference in modulating serial position effects requires further elucidation.

Purpose of the Study:

  • To examine how interference affects memory performance in rhesus monkeys using a serial probe recognition task.
  • To determine the influence of proactive and retroactive interference on primacy and recency effects in auditory memory.
  • To elucidate the relationship between interference, retention interval, and serial position effects in non-human primates.

Main Methods:

Related Experiment Videos

  • Two rhesus monkeys were trained on a serial probe recognition task involving lists of four natural or environmental sounds.
  • Variable retention intervals (short and 20 seconds) and interference manipulations (item separation, repetition, high-interference items) were employed.
  • Performance was assessed based on the serial position of correctly recognized sound items.

    • Main Results:

    • At short retention intervals, increased item separation and interference reduced the primacy effect and enhanced the recency effect.
    • Reducing proactive interference by altering early list items improved memory for later items.
    • At long retention intervals, increased interference on later items diminished the recency effect and revealed a primacy effect.

    Conclusions:

    • Interference significantly modulates both primacy and recency effects in the serial-position function of auditory memory in rhesus monkeys.
    • The findings suggest that proactive and retroactive interference play distinct roles in shaping memory recall.
    • This study contributes to understanding the fundamental principles of memory organization and interference in primate cognition.