Internal models and prediction of visual gravitational motion

Myrka Zago, Joseph McIntyre, Patrice Senot, Francesco Lacquaniti

Research output: Contribution to journalArticlepeer-review


Baurès et al. [Baurès, R., Benguigui, N., Amorim, M.-A., & Siegler, I. A. (2007). Intercepting free falling objects: Better use Occam's razor than internalize Newton's law. Vision Research, 47, 2982-2991] rejected the hypothesis that free-falling objects are intercepted using a predictive model of gravity. They argued instead for "a continuous guide for action timing" based on visual information updated till target capture. Here we show that their arguments are flawed, because they fail to consider the impact of sensori-motor delays on interception behaviour and the need for neural compensation of such delays. When intercepting a free-falling object, the delays can be overcome by a predictive model of the effects of gravity on target motion.

Original languageEnglish
Pages (from-to)1532-1538
Number of pages7
JournalVision Research
Issue number14
Publication statusPublished - Jun 2008


  • Internal models
  • Motion perception
  • Timing
  • Visuo-motor control

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems


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