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The influence of event structure on ...

Ezzyat, Youssef.

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The influence of event structure on episodic memory encoding and retrieval.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The influence of event structure on episodic memory encoding and retrieval./
Author:	Ezzyat, Youssef.
Description:	210 p.
Notes:	Source: Dissertation Abstracts International, Volume: 76-01(E), Section: B.
Contained By:	Dissertation Abstracts International76-01B(E).
Subject:	Cognitive psychology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3635133
ISBN:	9781321161021

The influence of event structure on episodic memory encoding and retrieval.
Ezzyat, Youssef.

The influence of event structure on episodic memory encoding and retrieval. - 210 p.

Source: Dissertation Abstracts International, Volume: 76-01(E), Section: B.

Thesis (Ph.D.)--New York University, 2014.

Our experiences unfold continuously but our memories for those experiences are organized around specific events that occur in particular contexts. How do the events and contexts that structure our lives impact our memories for our experiences? Prior work has shown that people perceive consistent boundaries between events that are thought to reflect changes in a mental representation of the recent context. Across three studies, this dissertation explores how such changes influence the mechanisms of memory encoding and retrieval, using measurements of behavior as well as brain activity using functional magnetic resonance imaging (fMRI). In Chapter 1, we demonstrate that event boundaries weaken the associations between representations in long-term memory and show evidence that this is related to integration processes that occur in prefrontal cortex within events. In Chapter 2, we find that boundaries lead people to remember two events as having occurred further apart in time, and show that the ability to bridge such boundaries in memory is related to stability in the pattern of activation in the hippocampus across time. In Chapter 3, we study a situation in which encoding information across contexts enhances memory and show evidence that this benefit is related to differentiation across the neural patterns associated with retrieved memory representations. Taken together, this data shows that memory organization is influenced by the structure of the events we experience and that different neural mechanisms contribute to associative memory formation within and across events. The findings suggest that the structure of our experiences dynamically modulates episodic encoding and retrieval and that the memory system takes advantage of both stable and changing contexts to form long-term associative memories.

ISBN: 9781321161021Subjects--Topical Terms:

523881
Cognitive psychology.

The influence of event structure on episodic memory encoding and retrieval.
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245 1 4 $a The influence of event structure on episodic memory encoding and retrieval.
300 $a 210 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-01(E), Section: B.
500 $a Adviser: Lila Davachi.
502 $a Thesis (Ph.D.)--New York University, 2014.
520 $a Our experiences unfold continuously but our memories for those experiences are organized around specific events that occur in particular contexts. How do the events and contexts that structure our lives impact our memories for our experiences? Prior work has shown that people perceive consistent boundaries between events that are thought to reflect changes in a mental representation of the recent context. Across three studies, this dissertation explores how such changes influence the mechanisms of memory encoding and retrieval, using measurements of behavior as well as brain activity using functional magnetic resonance imaging (fMRI). In Chapter 1, we demonstrate that event boundaries weaken the associations between representations in long-term memory and show evidence that this is related to integration processes that occur in prefrontal cortex within events. In Chapter 2, we find that boundaries lead people to remember two events as having occurred further apart in time, and show that the ability to bridge such boundaries in memory is related to stability in the pattern of activation in the hippocampus across time. In Chapter 3, we study a situation in which encoding information across contexts enhances memory and show evidence that this benefit is related to differentiation across the neural patterns associated with retrieved memory representations. Taken together, this data shows that memory organization is influenced by the structure of the events we experience and that different neural mechanisms contribute to associative memory formation within and across events. The findings suggest that the structure of our experiences dynamically modulates episodic encoding and retrieval and that the memory system takes advantage of both stable and changing contexts to form long-term associative memories.
590 $a School code: 0146.
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856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3635133