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Related Experiment Video

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Primacy and recency effects in nonhuman primates.

C A Castro1, T Larsen

  • 1Drug Assessment Division, U.S. Army Medical Research Institute of Chemical Defense, Aberdeen Proving Ground-Edgewood Area, Maryland 21010-5424.

Journal of Experimental Psychology. Animal Behavior Processes
|October 1, 1992
PubMed
Summary
This summary is machine-generated.

This study demonstrates primacy and recency memory effects in rhesus monkeys without an initiating response, supporting their presence in nonhuman primates and aligning with human memory research.

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Area of Science:

  • Cognitive Psychology
  • Animal Behavior
  • Neuroscience

Background:

  • Primacy and recency effects in nonhuman primates have been questioned due to the use of an initiating response.
  • This initiating response may artificially inflate performance for early list items, mimicking memory effects.

Purpose of the Study:

  • To investigate primacy and recency memory effects in rhesus monkeys without employing an initiating response.
  • To determine if these memory effects are present in nonhuman primates independent of task initiation methods.

Main Methods:

  • A serial probe recognition task was administered to 6 rhesus monkeys.
  • The presentation of the to-be-remembered list was not contingent on a prior initiating response.

Main Results:

  • Both primacy and recency effects were observed in all tested rhesus monkeys.
  • The findings indicate the presence of these memory effects even without an initiating response.

Conclusions:

  • Primacy and recency memory effects are demonstrable in nonhuman primates, similar to humans.
  • These effects across species may be explained by the configural-association theory.