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Related Experiment Video

Updated: Nov 15, 2025

A Within-Subject Experimental Design using an Object Location Task in Rats

A Within-Subject Experimental Design using an Object Location Task in Rats

Published on: May 6, 2021

Displaced Object Recognition Memory in Rats.

Ali N Mclagan¹, Jena B Hales¹

¹Department of Psychological Sciences, University of San Diego, San Diego, CA, USA.

|March 3, 2021

Summary

The Displaced Object Recognition (DOR) task assesses spatial memory by observing exploration of moved objects. This task requires no training and is useful across species, including humans and rats.

Keywords:

Behavior Hippocampus Novel object location Novel object recognition Rat Spatial memory

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Last Updated: Nov 15, 2025

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Published on: May 6, 2021

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Area of Science:

Cognitive Psychology
Neuroscience
Animal Behavior

Background:

Spatial recognition memory is crucial for survival.
Existing memory tasks often require extensive training or navigation.
A need exists for simple, translatable memory assessments.

Purpose of the Study:

To introduce and validate the Displaced Object Recognition (DOR) task.
To demonstrate the DOR task's utility in assessing spatial memory.
To highlight the translatability of the DOR task across species.

Main Methods:

The DOR task involves familiarization with two objects in an arena.
After a delay, one object's location is changed.
Exploration time of the displaced object serves as the memory index.

Main Results:

The DOR task effectively measures spatial recognition memory.
Exploration of the displaced object indicates memory retention.
The task does not require explicit training or navigational skills.

Conclusions:

The DOR task is a valid and efficient method for assessing spatial recognition memory.
Its non-reliance on training and navigation enhances its applicability.
The DOR task's cross-species translatability facilitates comparative memory research.