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Related Experiment Video

Updated: Jul 4, 2026

Recording Single Neurons' Action Potentials from Freely Moving Pigeons Across Three Stages of Learning
11:20

Recording Single Neurons' Action Potentials from Freely Moving Pigeons Across Three Stages of Learning

Published on: June 2, 2014

Amodal completion of moving objects by pigeons.

Yasuo Nagasaka1, Edward A Wasserman

  • 1Department of Psychology, University of Iowa, Iowa City, IA 52242-1407, USA. nyasuo@brain.riken.jp

Perception
|June 13, 2008
PubMed
Summary

Pigeons were tested on their ability to complete partially occluded moving shapes. While initial results showed no completion, later experiments revealed three pigeons could perceive complete shapes, suggesting motion aids this visual completion.

Area of Science:

  • Cognitive science
  • Animal behavior
  • Visual perception

Background:

  • Amodal completion is the perception of an object's complete form despite sensory information being missing.
  • Previous research has primarily focused on human amodal completion, with limited investigation in avian species.

Purpose of the Study:

  • To investigate whether pigeons exhibit amodal completion of partially occluded moving shapes.
  • To explore the potential role of motion in facilitating amodal completion in pigeons.

Main Methods:

  • Four pigeons were trained using a two-alternative forced-choice task to distinguish between complete and incomplete moving shapes.
  • Pigeons were then presented with partially occluded moving shapes during testing phases across four experiments.

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MPI CyberMotion Simulator: Implementation of a Novel Motion Simulator to Investigate Multisensory Path Integration in Three Dimensions

Published on: May 10, 2012

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Last Updated: Jul 4, 2026

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11:20

Recording Single Neurons' Action Potentials from Freely Moving Pigeons Across Three Stages of Learning

Published on: June 2, 2014

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A Method for Investigating Change Blindness in Pigeons (Columba Livia)

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MPI CyberMotion Simulator: Implementation of a Novel Motion Simulator to Investigate Multisensory Path Integration in Three Dimensions
09:46

MPI CyberMotion Simulator: Implementation of a Novel Motion Simulator to Investigate Multisensory Path Integration in Three Dimensions

Published on: May 10, 2012

Main Results:

  • In the first experiment, no pigeons demonstrated amodal completion, perceiving stimuli as fragmented.
  • In subsequent experiments (2-4), three out of four pigeons successfully completed the partially occluded moving shapes.
  • This indicates a potential for amodal completion in pigeons under specific conditions.

Conclusions:

  • Pigeons may possess the capacity for amodal completion of moving objects.
  • The findings suggest that stimulus motion might play a crucial role in enhancing amodal completion in pigeons.
  • This could be linked to motion's effect on figure-ground segregation, aiding in the perception of complete forms.