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Related Experiment Video

Updated: Apr 15, 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

Re-evaluating birds' ability to detect Glass patterns.

Jean-François Nankoo¹, Christopher R Madan, Douglas R Wylie

¹Department of Psychology, University of Alberta, P217 Biological Sciences Bldg, Edmonton, AB, T6G 2E9, Canada, nankoo@ualberta.ca.

Animal Cognition

|April 1, 2015

Summary

This summary is machine-generated.

Pigeons show improved sensitivity to dynamic glass patterns (GPs) compared to static GPs. This study suggests re-evaluating previous findings on GPs in pigeons using dynamic stimuli and dipole noise.

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Last Updated: Apr 15, 2026

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Published on: March 8, 2020

Area of Science:

Visual perception
Animal cognition
Comparative psychology

Background:

Glass patterns (GPs) are static visual stimuli perceived as global forms from random dot-pairs.
Dynamic GPs, created by sequential static GPs, elicit coherent motion perception and enhanced sensitivity in humans.
This heightened sensitivity is thought to result from the summation of form signals from individual GPs.

Purpose of the Study:

To investigate whether pigeons exhibit enhanced sensitivity to dynamic GPs, similar to humans.
To compare pigeon performance with static and dynamic GPs.
To re-evaluate the methodology used in previous studies of GPs in pigeons.

Main Methods:

Experiment 1: Pigeons were trained to discriminate dynamic GPs from noise versus static GPs.
Experiment 2: Static GPs were compared with those used in prior research, employing dipole noise patterns instead of uniform noise.

Main Results:

Pigeons demonstrated significantly better discrimination of dynamic GPs from noise compared to static GPs.
Pigeon performance with static GPs was insufficient for sensitivity measurements in this study.
The type of noise pattern (dipole vs. uniform) significantly impacts GP discrimination.

Conclusions:

Pigeons, like humans, show heightened sensitivity to dynamic GPs.
Previous findings on GPs in pigeons may need revision due to differences in stimuli and noise patterns.
Dynamic GPs with dipole noise are recommended for future research on GP perception in pigeons.