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Related Experiment Video

Updated: May 23, 2026

Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
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Object recognition testing: methodological considerations on exploration and discrimination measures.

Sven Akkerman1, Arjan Blokland, Olga Reneerkens

  • 1Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience-MHeNS, European Graduate School of Neuroscience-EURON, Maastricht University, Maastricht, The Netherlands.

Behavioural Brain Research
|April 12, 2012
PubMed
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The object recognition task (ORT) is sensitive but prone to bias. For reliable results, consider object familiarization, habituation to procedures, and using relative discrimination measures in animal memory studies.

Area of Science:

  • Neuroscience
  • Animal Behavior
  • Cognitive Psychology

Background:

  • The object recognition task (ORT) is a widely used one-trial learning test in animal research.
  • Methodological factors can significantly influence ORT outcomes, impacting data interpretation.

Purpose of the Study:

  • To investigate methodological issues impacting the object recognition task (ORT).
  • To analyze the relationship between discrimination measures and exploratory activity.
  • To assess the influence of habituation, object familiarity, trial duration, retention interval, and amnesic drugs on ORT performance.

Main Methods:

  • Meta-analysis of data from 28 ORT studies involving 731 male Wistar rats.
  • Examination of absolute and relative discrimination measures in relation to exploratory activity.

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Last Updated: May 23, 2026

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

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

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  • Investigation of factors including pre-experimental habituation, object familiarity, trial duration, retention interval, and drug effects (MK-801, scopolamine).

    • Main Results:

    • The ORT is highly sensitive to memory and exploratory performance but susceptible to biases from stress and drug side effects.
    • Sufficient exploration is necessary for stable discrimination, but sample trial exploration did not correlate with performance.
    • Test trial exploration positively correlated with absolute discrimination but not with relative discrimination measures.
    • Animals demonstrated memory over multiple sessions, suggesting familiarity influences object preference in short retention intervals.

    Conclusions:

    • The ORT's sensitivity necessitates careful consideration of methodological factors.
    • Pre-experimental familiarization with objects and habituation to procedures are crucial for valid ORT results.
    • Relative discrimination measures are recommended for their robustness against exploration biases.