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Episodic and semantic memory processes in the boundary extension effect: An investigation using the remember/know
Lisa M E C van den Bos1, Jeroen S Benjamins2, Albert Postma1
1Experimental Psychology, Helmholtz Institute, Utrecht University, the Netherlands.
Acta Psychologica
|November 1, 2020
Summary
Boundary extension (BE) is not solely based on episodic memory. Findings suggest schematic knowledge, common to episodic and semantic memory, drives this phenomenon.
Area of Science:
- Cognitive Psychology
- Memory Studies
Background:
- Boundary extension (BE) describes recalling more of a scene than was presented.
- The study investigates if BE relies on episodic memory or semantic schema knowledge.
Purpose of the Study:
- To determine the role of episodic versus semantic memory in boundary extension.
- To explore the contribution of schematic knowledge to BE.
Main Methods:
- Utilized the remember/know paradigm within a boundary extension task.
- Participants incidentally learned scenes, then distinguished between remembering (episodic) and knowing (semantic) them.
- BE was measured by rating the similarity of zoomed-in, zoomed-out, and original views.
Main Results:
- A consistent boundary extension pattern was observed.
- No significant difference in BE occurred between episodic ('remember') and semantic ('know') memory conditions.
- The remember/know paradigm effectively differentiated between response types.
Conclusions:
- Boundary extension may not critically depend on episodic memory's contextual details.
- Schematic knowledge, shared across memory types, appears crucial for BE.
- Semantic guidance likely creates expectations for information beyond scene boundaries.
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