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Episodic memory integration shapes value-based decision-making in spatial navigation.

Qiliang He¹, Jancy Ling Liu², Elizabeth H Beveridge¹

¹School of Psychology.

Journal of Experimental Psychology. Learning, Memory, and Cognition

|April 7, 2022

Summary

This study reveals how spatial navigation decisions integrate past experiences. Most participants used a common memory model, suggesting memory integration is key for effective wayfinding and decision-making.

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Area of Science:

Cognitive Neuroscience
Decision Science
Spatial Navigation

Background:

Value-based decision-making is extensively studied in economics and psychology.
Its role in spatial navigation, crucial for survival, is under-explored.
Understanding episodic memory integration in decision-making is limited.

Purpose of the Study:

Investigate how episodic memories are integrated in value-based spatial navigation.
Determine factors influencing memory integration extent.
Model decision-making based on target-specific versus target-common past performance.

Main Methods:

Participants learned object locations in a virtual environment.
Decisions on reaching goals from familiar vs. unpredictable start locations were analyzed.
Computational models (Target-specific vs. Target-common) were developed and tested.

Main Results:

Most participants' decisions aligned with the Target-common model, indicating integrated memory use.
Greater use of the Target-common model correlated with higher performance variability for individual targets.
Task success was predicted by an interaction of probability estimation and self-reported task ability.

Conclusions:

Navigational episodic memories influence value-based decision-making.
Individual differences in memory integration and performance variability exist.
Probability estimation and self-assessed ability predict navigational success.