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Related Experiment Video

Updated: Jun 20, 2026

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

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

Published on: May 10, 2012

Motion-induced position shifts occur after motion integration.

George Mather¹, Andrea Pavan

¹Psychology School, University of Sussex, Falmer, Brighton BN1 9QH, UK. g.mather@susx.ac.uk

Vision Research

|September 19, 2009

Summary

Motion signals impact perceived object location. This study reveals motion-induced position shifts (MIPS) in the primate visual system arise from motion integration in later stages, not early V1 processing.

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Area of Science:

Neuroscience
Visual Perception
Primate Vision

Background:

The primate visual system processes motion in stages, starting with local motion detection in V1 and progressing to rigid surface motion encoding in MT.
Psychophysical studies demonstrate motion signals alter an object's perceived position, a phenomenon known as motion-induced position shift (MIPS).

Purpose of the Study:

To investigate the specific roles of early (V1) and later (MT) visual processing stages in generating motion-induced position shifts (MIPS).
To determine whether MIPS originates from local motion signals or integrated motion information.

Main Methods:

Compared MIPS induced by single Gabor patches (local components) with MIPS induced by plaids (combined components).
Analyzed whether MIPS for plaids reflected individual component shifts or integrated motion computations.

Main Results:

Motion-induced position shifts (MIPS) were larger for plaids than for individual components.
The observed MIPS in plaids were consistent with motion integration, not solely based on local V1 signals.

Conclusions:

The findings suggest that motion integration processes, likely occurring in area MT or later, are crucial for generating motion-induced position shifts (MIPS).
Perceived object position is influenced by integrated motion signals rather than solely by low-level motion detectors in V1.