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Related Experiment Video

Updated: Feb 2, 2026

A Method for Investigating Change Blindness in Pigeons Columba Livia

A Method for Investigating Change Blindness in Pigeons Columba Livia

Published on: September 7, 2018

Pigeons spontaneously form three-dimensional shape categories.

Jessie J Peissig¹, Michael E Young², Edward A Wasserman³

¹Department of Psychology, California State University Fullerton, P.O. Box 6846, Fullerton, CA 92834, United States.

Behavioural Processes

|November 16, 2018

Summary

This summary is machine-generated.

Pigeons spontaneously recognize 3D object shapes (geons) across different views. They excel at shape categorization, unlike tasks requiring orientation-specific features.

Keywords:

Categorization Object recognition Pigeons Pseudocategory Visual perception

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Last Updated: Feb 2, 2026

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Area of Science:

Cognitive psychology
Animal behavior
Computer vision

Background:

Understanding how animals perceive and categorize 3D object shapes is crucial for cognitive science.
Investigating shape representation in pigeons offers insights into visual processing mechanisms.
Depth rotation poses challenges for object recognition due to changing 2D projections.

Purpose of the Study:

To determine if pigeons can generalize 3D object shape recognition across different orientations in depth.
To compare categorization based on object identity versus orientation-dependent features.
To explore the spontaneous tendency of pigeons towards object shape constancy.

Main Methods:

Pigeons were trained on tasks involving four distinct 3D objects (geons) presented from multiple viewpoints.
A Categorization group learned to identify geons based on their inherent 3D shape.
A Pseudocategorization group learned arbitrary groupings based on orientation-specific visual cues.

Main Results:

The Categorization group rapidly achieved high accuracy in identifying geons.
The Pseudocategorization group failed to perform reliably above chance.
Reaction times were significantly shorter for the Categorization group compared to the Pseudocategorization group.

Conclusions:

Pigeons exhibit a robust, innate ability to recognize 3D object shapes irrespective of their orientation in depth.
This suggests a strong spontaneous tendency for shape constancy in pigeons.
Pigeons prioritize object identity over arbitrary, orientation-dependent features for categorization.