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A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
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Explicit memories, also known as declarative memories, are consciously remembered, recalled, and reported. Studying for a chemistry exam involves material that will become part of explicit memory. There are two types of explicit memory: episodic and semantic.
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Related Experiment Video

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GENESIS: A Generative model of Episodic-Semantic Interaction.

Marco D'Alessandro1, Leo D'Amato1, Mikel Elkano1

  • 1Institute of Cognitive Sciences and Technologies, National Research Council, Rome, Italy.

Neuroscience and Biobehavioral Reviews
|March 7, 2026
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Summary

This study introduces GENESIS, a computational model explaining how semantic and episodic memory interact. It shows how memory capacity and semantic processing influence recall and imagination.

Keywords:
CortexEpisodic memoryGenerative modelHippocampusRate–distortionRetrieval-augmented generationSemantic memory

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Area of Science:

  • Cognitive Neuroscience
  • Computational Neuroscience
  • Memory Research

Background:

  • Declarative memory involves semantic (facts) and episodic (events) systems.
  • Existing models lack a unified framework for semantic and episodic memory interactions.
  • Understanding these interactions is crucial for explaining learning, recall, and imagination.

Purpose of the Study:

  • To introduce the Generative Episodic-Semantic Integration System (GENESIS), a computational model.
  • To provide a unified framework for understanding semantic and episodic memory interactions.
  • To explain core empirical phenomena in both memory domains.

Main Methods:

  • Developed GENESIS, a computational model integrating a Cortical-VAE (semantic) and Hippocampal-VAE (episodic).
  • Utilized a retrieval-augmented generation (RAG) architecture.
  • Simulated memory processes to reproduce behavioral findings.

Main Results:

  • GENESIS successfully reproduced generalization in semantic memory and various episodic memory effects (recognition, serial recall, gist distortions).
  • The model captured constructive episodic simulation and dynamic interactions between memory systems.
  • It elucidated the impact of capacity constraints on memory fidelity and memorability.

Conclusions:

  • Memory is an active, constructive, and resource-bounded process.
  • GENESIS offers a principled account of memory, bridging semantic and episodic systems.
  • The model provides insights into the generative foundations of human cognition and memory interactions.