Episodic memory reconsolidation and strengthening

Tay, Kai Rong (2020). Episodic memory reconsolidation and strengthening. University of Birmingham. Ph.D.

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Abstract

Episodic memories are not always accurate, subject to false recollection due to the process of memory reconsolidation (Loftus, 2005). Memory reactivation places memory to a labile state and can lead to two phenomena: memory updating/reconsolidation with possibility of having inaccurate memories (Hupbach et al. 2007) and memory strengthening. By replicating Hupbach et al. (2007, 2008) study, Study 1 aimed to investigate the impact of music upon memory reconsolidation whereas Study 2 explored whether exposure to original learning context is sufficient to trigger reconsolidation. Study 1 found out that reconsolidation process may not be as reliable as suggested in existing reconsolidation studies. Study 2 discovered dissociation between updating of list memory and resistance to the memory-weakening effect of interference, suggesting reactivation-induced reconsolidation can maintain or even strengthen memories. Study 3 tested directly the capacity of memory reactivation to facilitate memory strengthening. An idea of implementing 6 hours interval in between Day 2 sessions was suggested, aimed to determine whether or not the learning effect is mediated by reconsolidation processes. The common effects of retrieval-relearning, relearning-retrieval, relearning-relearning, retrieval-6 hours-relearning, relearning-6 hours-retrieval to strengthen episodic memory may reflect different underlying processes, one or more of which might be related to memory reconsolidation.

Type of Work:

Thesis (Doctorates > Ph.D.)

Award Type:

Doctorates > Ph.D.

Supervisor(s):