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Related Experiment Video

Updated: May 11, 2026

Three-Dimensional Shape Modeling and Analysis of Brain Structures
05:33

Three-Dimensional Shape Modeling and Analysis of Brain Structures

Published on: November 14, 2019

Sensory memory of structure-from-motion is shape-specific.

Alexander Pastukhov1, Jana Füllekrug, Jochen Braun

  • 1Center for Behavioral Brain Sciences, Magdeburg, Germany and Cognitive Biology, Otto-von-Guericke Universität, Magdeburg, Germany, Pastukhov.Alexander@gmail.com.

Attention, Perception & Psychophysics
|May 16, 2013
PubMed
Summary

Perceptual priming stabilizes visual displays by creating shape-specific sensory memory for structure-from-motion (SFM) objects. This memory influences subsequent perception of object rotation, indicating higher-level shape representations.

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Motion-Acuity Test for Visual Field Acuity Measurement with Motion-Defined Shapes

Published on: February 23, 2024

Area of Science:

  • Visual perception
  • Cognitive neuroscience
  • Computational neuroscience

Background:

  • Perceptual priming stabilizes phenomenal appearance in multistable visual displays.
  • Prior exposure creates persistent sensory memory, facilitating re-perception.
  • Structure-from-motion (SFM) displays allow investigation of 3D shape perception.

Purpose of the Study:

  • Investigate perceptual priming for apparent rotation in depth of ambiguous SFM displays.
  • Determine if sensory memory for rotation is specific to 3D object shape.
  • Assess if object shape similarity can be measured by priming persistence.

Main Methods:

  • Generated SFM objects with varying 3D shapes.
  • Presented objects in random order with intervening blank periods.
  • Measured the probability of rotation direction persistence between successive objects.

Main Results:

  • Rotation persistence was greatest between identical SFM objects, intermediate for similar objects, and negligible for dissimilar objects.
  • Sensory memory for apparent rotation was specific to 3D shape.
  • Priming persistence did not depend on presentation order, suggesting a commutative similarity measure.

Conclusions:

  • Sensory memory underlying SFM priming is specific to 3D object shape, contradicting prior findings.
  • Priming persistence offers a metric for 3D shape similarity.
  • Higher-level representations of object surface and shape likely underlie SFM sensory memory.