Constructing Memories, Episodic and Semantic

Area of Science:

• Cognitive Psychology
• Neuroscience
• Philosophy of Mind

Background:

• Traditional views posit semantic memory stores invariant knowledge structures.
• Episodic memory, recalling specific events, is widely accepted as reconstructive.
• The relationship and shared mechanisms between semantic and episodic memory remain debated.

Purpose of the Study:

• To challenge the conception of semantic memory as purely invariant.
• To propose that semantic memory is also reconstructive, similar to episodic memory.
• To explore the implications of shared causal mechanisms between memory systems.

Main Methods:

• Reviewing evidence for shared neural substrates between episodic and semantic memory.
• Analyzing hallmark properties of episodic memory constructivism and their presence in semantic memory.
• Examining the semantic pointer architecture as a proof of concept.

Main Results:

• Evidence suggests episodic and semantic memory utilize a domain-general system for relational processing.
• Hallmark properties of constructivism observed in episodic memory are also present in semantic memory.
• The semantic pointer architecture provides a framework for understanding reconstructive semantic memory.

Conclusions:

• Semantic memory is likely reconstructive, not invariant, due to shared mechanisms with episodic memory.
• A domain-general relational processing system may underlie both memory types.
• This challenges established models of semantic memory and offers a new perspective via the semantic pointer architecture.