Effects of post-encoding stress on performance in the DRM false memory paradigm

Area of Science:

• Cognitive Psychology
• Neuroscience
• Memory Research

Background:

• While stress effects on true memory are known, its impact on false memory is unclear.
• False memories arise from recalling non-studied information, particularly in tasks like the Deese-Roediger-McDermott (DRM) paradigm.
• Understanding stress's role in false memory is crucial for memory research.

Purpose of the Study:

• To investigate how acute stress influences the formation of false memories.
• To determine if stress differentially affects the recall of true versus false memories.
• To explore the potential mechanisms by which stress modulates memory consolidation.

Main Methods:

• Participants underwent a psychosocial stress test (TSST) or a control condition after encoding word lists.
• A Deese-Roediger-McDermott (DRM) false memory task was used to assess memory.
• Memory performance (true and false recognition) was tested 24 hours later.

Main Results:

• Stress significantly reduced the recognition of studied (true) words.
• Stress significantly increased the false recognition of unstudied (lure) words.
• Stressed individuals recalled more false memories than true memories, unlike control participants.

Conclusions:

• Acute stress enhances false memory formation in the DRM task.
• Stress appears to promote gist-based memory processing at the expense of detailed recall.
• This suggests stress may impair hippocampus-dependent detail-specific memory consolidation.