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Updated: Jun 4, 2026

The Deese-Roediger-McDermott (DRM) Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory
Published on: January 31, 2017
Correcting false information in memory: manipulating the strength of misinformation encoding and its retraction
Ullrich K H Ecker1, Stephan Lewandowsky, Briony Swire
1School of Psychology, University of Western Australia, Crawley, WA, 6009, Australia. ullrich.ecker@uwa.edu.au
Even strong corrections may not fully eliminate the continued influence of misinformation if it was strongly encoded. This memory effect persists despite attempts to retract false information.
Area of Science:
- Cognitive Psychology
- Memory Studies
- Information Science
Background:
- Misinformation, once encoded, can persistently influence memory and reasoning.
- Understanding factors influencing the persistence of misinformation is crucial for memory and belief correction.
Purpose of the Study:
- To investigate how encoding strength and retraction strength impact the continued influence of misinformation.
- To determine the effectiveness of retractions in mitigating misinformation's effects under varying encoding conditions.
Main Methods:
- Participants read event reports containing misinformation followed by a correction.
- Encoding strength was manipulated through repetition and cognitive load.
- Correction strength was also manipulated.
Main Results:
- Stronger retractions reduced continued influence for strongly encoded misinformation.
- Even strong retractions did not eliminate continued influence for weakly encoded misinformation.
- A computational model supported these findings.
Conclusions:
- The continued influence of misinformation is robust and difficult to eliminate completely.
- Encoding strength plays a critical role in the persistence of misinformation effects.
- Memory and reasoning remain susceptible to false information despite corrective measures.
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