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Amodal completion in mouse vision

G Kanizsa1, P Renzi, S Conte

  • 1Dipartimento di Psicologia dell'Università di Trieste, Italy.

Perception
|January 1, 1993
PubMed
Summary
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Mice exhibit amodal completion, a human perceptual phenomenon, suggesting shared visual processing across species. This finding challenges previous assumptions about the phylogenetic limits of complex perception.

Area of Science:

  • Comparative psychology
  • Neuroscience
  • Visual perception

Background:

  • Amodal completion is a human perceptual phenomenon where incomplete objects are perceived as whole.
  • The presence of such complex perception in non-primate species like mice is largely unexplored.

Purpose of the Study:

  • To investigate if amodal completion occurs in mouse visual perception.
  • To determine if this phenomenon extends to this phylogenetic level.

Main Methods:

  • Three experiments utilizing a simultaneous-discrimination task with a jumping-stand.
  • Subjects: 36 male DBA/J mice, with 12 per experiment.
  • Learning criterion: 87% correct responses, followed by 15 interpolated test trials.

Main Results:

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  • 23 out of 36 mice reached the learning criterion.
  • 17 of these 23 mice (74%) adopted a decisional strategy indicative of amodal completion (chi 2 = 5.261, p = 0.021).
  • A trend towards similar strategies was observed in 6 additional mice.

Conclusions:

  • The results suggest that a perceptual phenomenon similar to human amodal completion is present in mice.
  • This indicates that complex visual perception mechanisms may be conserved at a lower phylogenetic level than previously thought.
  • Alternative explanations for the observed behaviors are considered.