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Updated: Feb 18, 2026

The Deese-Roediger-McDermott DRM Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory
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Complementarity in false memory illusions.

C J Brainerd1, V F Reyna1

  • 1Department of Human Development, Cornell University.

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Summary
This summary is machine-generated.

The Deese-Roediger-McDermott (DRM) illusion, a type of false memory, is reinterpreted. New findings suggest it creates a complementarity illusion, not a reality reversal, impacting memory recall.

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Area of Science:

  • Cognitive Psychology
  • Memory Research
  • False Memory Studies

Background:

  • The Deese-Roediger-McDermott (DRM) illusion is a prominent model of false memory.
  • Previous interpretations suggested the DRM illusion represents a 'reality reversal' where new words are mistakenly recalled as old.
  • Prior studies were limited by memory tests only assessing 'old' vs. 'new' recognition.

Purpose of the Study:

  • To investigate the nature of the DRM illusion using a more comprehensive memory testing methodology.
  • To differentiate between 'reality reversal' and 'complementarity' as explanations for the DRM illusion.
  • To introduce and validate the 'complementarity ratio' as a measure of memory performance in the DRM paradigm.

Main Methods:

  • Developed and employed memory tests that assessed recognition for both 'old' status and 'new-similar' status.
  • Analyzed memory performance for list words and critical distractors under these enhanced testing conditions.
  • Introduced the 'complementarity ratio' to quantify memory complementarity and its direction.

Main Results:

  • List words and critical distractors are remembered distinctly.
  • List words exhibit compensatory memory (high 'old', low 'new-similar').
  • Critical distractors show complementary memory (high 'old' and high 'new-similar'), indicating a complementarity illusion, not reality reversal.

Conclusions:

  • The DRM procedure induces a complementarity illusion, challenging the 'reality reversal' interpretation.
  • The conjoint recognition model explains complementarity through specific retrieval processes.
  • The complementarity ratio provides a robust measure for analyzing false memory phenomena.