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Related Experiment Video

Updated: Jun 17, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
09:49

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

For the mind's eye the world is two-dimensional.

Janek S Lobmaier1, Fred W Mast, Heiko Hecht

  • 1University of Zurich, Zurich, Switzerland.

Psychonomic Bulletin & Review
|January 19, 2010
PubMed
Summary

Visual mental images behave like 2-D pictures, not 3-D perceptions. This study found the "rotation effect" in mental images and pictures, but not in direct 3-D object perception.

Area of Science:

  • Cognitive Neuroscience
  • Psychology
  • Philosophy of Mind

Background:

  • The nature of visual mental imagery remains debated, with theories suggesting it preserves 3-D perceptual properties or resembles 2-D representations.
  • Understanding mental imagery is crucial for cognitive science and artificial intelligence.

Purpose of the Study:

  • To investigate whether visual mental images share characteristics with 2-D pictures or preserve 3-D perceptual information.
  • To determine if the 'rotation effect,' observed in 2-D images, extends to mental imagery.

Main Methods:

  • 16 observers judged pointing accuracy for real objects and their photographs in both perception and imagery conditions.
  • Experiment 1 involved direct perception and imagery of 3-D objects.
  • Experiment 2 involved perception and imagery of photographs.

More Related Videos

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
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Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues

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06:54

Methods for Presenting Real-world Objects Under Controlled Laboratory Conditions

Published on: June 21, 2019

Related Experiment Videos

Last Updated: Jun 17, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
09:49

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
08:04

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues

Published on: December 4, 2013

Methods for Presenting Real-world Objects Under Controlled Laboratory Conditions
06:54

Methods for Presenting Real-world Objects Under Controlled Laboratory Conditions

Published on: June 21, 2019

Main Results:

  • A significant difference in pointing errors between perception and imagery was found for 3-D objects (Experiment 1).
  • No significant difference was observed between perception and imagery for photographs (Experiment 2).
  • The 'rotation effect' was present in mental images and photographs, but not in direct perception of 3-D objects.

Conclusions:

  • Visual mental images exhibit characteristics of 2-D representations, such as the rotation effect.
  • Mental imagery appears to differ fundamentally from direct perception of 3-D objects.
  • These findings support the view that mental images are more akin to pictures than to 3-D perceptual models.