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Metamemory ratings predict long-term changes in reactivated episodic memories
Amnon Yacoby1, Yadin Dudai1, Avi Mendelsohn2
1Department of Neurobiology, Weizmann Institute of Science Rehovot, Israel.
Frontiers in Behavioral Neuroscience
|February 25, 2015
Summary
Subjective memory confidence, or Feeling of Knowing (FOK), predicts how much long-term memories change after reactivation. Lower FOK means less memory modification when new information is introduced immediately.
Area of Science:
- Cognitive Neuroscience
- Memory Research
- Metacognition
Background:
- Long-term memory becomes unstable after reactivation, allowing for modifications.
- Feeling of Knowing (FOK) is a metacognitive judgment of memory accessibility.
Purpose of the Study:
- To investigate if FOK predicts the degree of change in long-term episodic memories after post-retrieval manipulation.
- To understand the relationship between subjective memory confidence and memory lability.
Main Methods:
- Participants recalled a movie, rated their FOK, and then received new information either immediately or 1 day later.
- Memory performance was assessed after the introduction of new information.
- FOK ratings were collected during a reminder phase involving memory cues.
Main Results:
- When new information was presented immediately after memory reactivation, lower FOK ratings correlated with less memory decline.
- No significant relationship between FOK and memory strength was observed when new information was delayed by 1 day.
- Memory performance was contingent on the temporal proximity of new information to memory reactivation.
Conclusions:
- Subjective memory accessibility (FOK) influences the extent to which reactivated memories are modified by new information.
- The timing of post-retrieval interventions is critical for memory modification.
- FOK serves as a potential predictor of memory lability and susceptibility to interference.
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