Neurophysiological correlates of memory illusion in both encoding and retrieval phases

Area of Science:

• Cognitive Neuroscience
• Psychology

Background:

• False recognition, a common memory error, occurs in the Deese-Roediger-McDermott (DRM) paradigm.
• Understanding the neural basis of true versus false memories is crucial for cognitive science.

Purpose of the Study:

• Investigate the neural correlates of differential processing in true and false memories.
• Examine the roles of encoding and retrieval phases in generating memory illusions.
• Utilize event-related potentials (ERPs) to differentiate memory processes.

Main Methods:

• Recorded ERPs during both encoding and retrieval phases in the DRM paradigm.
• Analyzed ERP components, including N170 and Late Positive Component (LPC).
• Examined ERP old/new effects and late slow negativity at retrieval.

Main Results:

• Encoding ERPs showed differences (smaller N170, larger LPC) for associates leading to false memories, suggesting enhanced semantic processing.
• Retrieval ERPs indicated similar early effects (semantic priming) for true and false recognition.
• Parietal old/new effect was greater for true recognition (recollection), while late slow negativity differentiated true and false recognition.

Conclusions:

• Both encoding and retrieval processes contribute to false memory formation.
• Neural mechanisms for monitoring memory encoding and retrieval may involve shared processes, indicated by LPC and late negativity patterns.