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Explicit Memories01:27

Explicit Memories

404
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.
Episodic memory contains information about personally experienced events and is reported as a story. An example of episodic memory is recalling a birthday celebration. This type of memory includes the what, where, and when of an event, as...
404
Storage01:23

Storage

337
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...
337
Implicit Memories01:24

Implicit Memories

410
Implicit memories, also known as non-declarative memories, are long-term memories that function outside of conscious awareness. These memories influence behavior and skills without explicit knowledge. This type of memory is evident in tasks like playing tennis, snowboarding, and texting. Implicit memory has three subsystems: procedural memory, conditioning, and priming. This type of memory is essential in various activities, from everyday tasks to specialized skills.
One key aspect of implicit...
410

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Related Experiment Video

Updated: Jan 8, 2026

Behavioral Tracking and Neuromast Imaging of Mexican Cavefish
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Episodic-like memory in a simulation of cuttlefish behavior.

Sriskandha Kandimalla1, Qian Ying Wong1, Kary Zheng2

  • 1Department of Cognitive Sciences, University of California, Irvine, CA, 92697-5100, USA.

Scientific Reports
|December 13, 2025
PubMed
Summary
This summary is machine-generated.

This study models episodic-like memory in cuttlefish, demonstrating how they remember food and predators. The findings suggest convergent evolution of cognitive mechanisms for episodic memory across species.

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Area of Science:

  • Cognitive Science
  • Neuroscience
  • Animal Behavior

Background:

  • Episodic memory, crucial for recalling event details (what, when, where), is observed across diverse species.
  • Cuttlefish exhibit episodic-like memory, recalling food availability timing and location.
  • Previous research demonstrated cuttlefish's capacity for episodic-like memory through behavioral experiments.

Purpose of the Study:

  • To replicate and model episodic-like memory observed in cuttlefish using a parsimonious computational model.
  • To extend the model by introducing a predator-prey scenario to explore memory's role in complex decision-making.
  • To investigate how accessing memory for different queries (action vs. place) influences behavior.

Main Methods:

  • Developed a computational model to simulate episodic memory mechanisms.
  • Introduced a predator-prey simulation where the agent must remember creature types, locations, and times.
  • Queried the model for actions (hunt/hide) and locations to observe behavioral responses.

Main Results:

  • The model successfully replicated cuttlefish's episodic-like memory for food and predator encounters.
  • Behavior varied based on memory access: agents hunted preferred prey when available and hid from predators.
  • Agents acted opportunistically when queried by location, seeking less-preferred food away from predators.

Conclusions:

  • The developed model provides a parsimonious explanation for episodic-like memory in cuttlefish.
  • Behavioral flexibility arises from how memory is accessed, mimicking aspects of human mental time travel.
  • The study suggests convergent evolution of cognitive mechanisms underlying episodic memory in vertebrates and invertebrates.