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The Deese-Roediger-McDermott (DRM) Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory
Published on: January 31, 2017
Age-related differences in brain activity during true and false memory retrieval.
Nancy A Dennis1, Hongkeun Kim, Roberto Cabeza
1Center for Cognitive Neuroscience, Duke University, Durham, NC 27705, USA. ndennis@duke.edu
Journal of Cognitive Neuroscience
|February 29, 2008
Summary
Older adults exhibit reduced true memories and increased false memories due to brain changes. This study reveals hippocampal decline impacts true recall, while temporal cortex activity influences false memory formation in aging.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Gerontology
Background:
- Aging is associated with declines in memory function, including both reduced true memory and increased false memory.
- Understanding the neural mechanisms underlying these age-related memory changes is crucial for developing interventions.
Purpose of the Study:
- To investigate the neural correlates of true and false memory in older adults compared to young adults.
- To examine the role of the hippocampus and lateral temporal cortex in age-related memory differences.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used to scan young and older adults during a word recognition task.
- The task employed a Deese-Roediger-McDermott (DRM) paradigm, including studied words, critical lures (unstudied but associated words), and unrelated words.
- Brain activity was analyzed during correct recognition of studied words (true memory) and incorrect recognition of critical lures (false memory).
Main Results:
- Older adults showed reduced hippocampal activity but increased retrosplenial cortex activity during true memory recognition, suggesting impaired recollection and compensatory mechanisms.
- Older adults exhibited increased activity in the left lateral temporal cortex during false memory recognition, indicating reliance on semantic gist processing.
- These findings highlight distinct neural patterns for true and false memory in aging.
Conclusions:
- Age-related deficits in true memory are linked to diminished hippocampal function, crucial for recollection.
- Increased false memories in older adults are associated with heightened activity in the lateral temporal cortex, supporting semantic gist-based processing.
- These neural differences underscore the complex impact of aging on memory systems.
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