Experimental Brain Research

, Volume 166, Issue 3–4, pp 538–547 | Cite as

Low-level integration of auditory and visual motion signals requires spatial co-localisation

  • Georg F. MeyerEmail author
  • Sophie M. Wuerger
  • Florian Röhrbein
  • Christoph Zetzsche
Research Article


It is well known that the detection thresholds for stationary auditory and visual signals are lower if the signals are presented bimodally rather than unimodally, provided the signals coincide in time and space. Recent work on auditory–visual motion detection suggests that the facilitation seen for stationary signals is not seen for motion signals. We investigate the conditions under which motion perception also benefits from the integration of auditory and visual signals. We show that the integration of cross-modal local motion signals that are matched in position and speed is consistent with thresholds predicted by a neural summation model. If the signals are presented in different hemi-fields, move in different directions, or both, then behavioural thresholds are predicted by a probability-summation model. We conclude that cross-modal signals have to be co-localised and co-incident for effective motion integration. We also argue that facilitation is only seen if the signals contain all localisation cues that would be produced by physical objects.


Visual Signal Visual Motion Motion Signal Linear Summation Bimodal Stimulus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was supported by the EU TMR projects SPHEAR and HOARSE and by the Royal Society. We are grateful to the subjects who took part in the experiments.


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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Georg F. Meyer
    • 1
    Email author
  • Sophie M. Wuerger
    • 1
  • Florian Röhrbein
    • 2
    • 3
  • Christoph Zetzsche
    • 2
  1. 1.Centre for Cognitive Neuroscience, School of PsychologyUniversity of LiverpoolLiverpoolUK
  2. 2.Cognitive Neuroinformatics, School of Mathematics and Computer ScienceBremen UniversityBremenGermany
  3. 3.HONDA Research Institute EuropeOffenbachGermany

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