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Related Experiment Video

Updated: Feb 26, 2026

Novel Object Recognition Test for the Investigation of Learning and Memory in Mice
08:52

Novel Object Recognition Test for the Investigation of Learning and Memory in Mice

Published on: August 30, 2017

77.9K

Novel object recognition task for mice: Is it a test for memory, object neophobia or innate preference?

H Koivisto1, C Maguire1, H Tanila1

  • 1A. I. Virtanen Institute, University of Eastern Finland, Kuopio 70210, Finland.

Behavioural Brain Research
|May 25, 2025
PubMed
Summary

The novel object recognition (NOR) test in mice shows object novelty preference varies individually. Standardizing object novelty and using counterbalanced designs are crucial for reproducible memory research.

Keywords:
AnxietyMemoryMouseNeophobiaNovelty

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Last Updated: Feb 26, 2026

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Area of Science:

  • Neuroscience
  • Animal Behavior

Background:

  • The novel object recognition (NOR) task is a standard memory test in mice.
  • Object selection and reporting in NOR studies lack standardization, potentially affecting reproducibility.

Purpose of the Study:

  • To investigate the impact of object novelty versus general appeal on mouse behavior in the NOR task.
  • To evaluate the reporting standards of object-related details in published NOR studies.

Main Methods:

  • Three experiments with 41 C57BL/6J mice using 18 object pairs in a cross-over design.
  • Literature review of NOR studies in top-tier journals (Nature) published in 2024.
  • Analysis of object description and design (e.g., cross-over) in reported NOR experiments.

Main Results:

  • Individual mice showed variable preferences for novel objects, highlighting the need for counterbalanced designs.
  • Pre-test habituation increased object exploration for initial object pairs.
  • Literature analysis revealed poor reporting of object details (24.6%) and cross-over designs (14.5%) in NOR studies.
  • A significant percentage of studies (20.3%) conflated object neophobia with memory outcomes.

Conclusions:

  • Object novelty preference in the NOR task is subject to individual variation.
  • Standardized reporting of object details and experimental design is essential for the reproducibility of NOR findings.
  • Clearer differentiation between neophobia and memory is needed in NOR study interpretations.