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Related Experiment Videos

Doubts about double dissociations between short- and long-term memory.

Charan Ranganath1, Robert S Blumenfeld

  • 1Center for Neuroscience, University of California at Davis, CA 95616, USA. cranganath@ucdavis.edu

Trends in Cognitive Sciences
|July 9, 2005
PubMed
Summary

This study questions the need for separate neural stores for short-term memory (STM) and long-term memory (LTM). Evidence suggests impairments are not always selective, challenging distinct memory system theories.

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • Historically, distinct neural stores for short-term memory (STM) and long-term memory (LTM) have been proposed.
  • Neuropsychological studies reporting dissociations have supported this view.

Purpose of the Study:

  • To review recent evidence on dissociations between STM and LTM.
  • To question the necessity of distinct neural memory stores.

Main Methods:

  • Review of recent neuropsychological and memory research.
  • Analysis of evidence for selective STM or LTM impairments.

Main Results:

  • Evidence for selective STM or LTM impairments is problematic.
  • The findings challenge theories positing distinct neural memory stores.

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Conclusions:

  • The distinction between STM and LTM may not require separate neural substrates.
  • Alternative explanations for memory mechanisms across retention intervals are considered.