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Updated: Aug 1, 2026

The Deese-Roediger-McDermott (DRM) Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory
Published on: January 31, 2017
Item method directed forgetting diminishes false memory
Tammy A Marche1, Charles J Brainerd, David G Lane
1Department of Psychology, St. Thomas More College, University of Saskatchewan, Saskatoon, Canada. Marche@sask.usask.ca
Directed forgetting, a memory control technique, reduces false memories in the Deese-Roediger-McDermott (DRM) paradigm by impairing meaning processing. This study found it decreased both true and false memory recall.
Area of Science:
- Cognitive Psychology
- Memory Studies
Background:
- The Deese-Roediger-McDermott (DRM) paradigm is a common method for inducing false memories.
- Directed forgetting is a memory control process that can influence recall accuracy.
Purpose of the Study:
- To investigate whether directed forgetting can reduce the DRM false memory illusion.
- To examine the impact of directed forgetting on both true and false memory responses.
Main Methods:
- Participants studied lists of semantically associated words.
- Directed forgetting instructions were employed, with participants either remembering all items or selectively forgetting items from certain sub-lists.
- Recall and recognition tests were administered to assess memory performance.
Main Results:
- Directed forgetting significantly reduced false memory intrusions and false alarm rates in the DRM paradigm.
- The effect was observed for both true and false memory responses, using an item method.
- Forgetting instructions decreased both verbatim and meaning-based processing of list items.
Conclusions:
- Directed forgetting can effectively mitigate DRM false memories by interfering with semantic processing.
- These findings support dual-process theories of memory, such as fuzzy-trace theory.
- The study enhances understanding of how memory editing can be achieved through directed forgetting techniques.
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