Corrective processes in grasping after perturbations of object size

C. Hesse, V. H. Franz

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


Researchers proposed that humans may achieve grip adaptation to a new object size by reprogramming and substituting the initially planned motor program. The authors investigated corrective processes in grasping by using a size perturbation paradigm. In 3 experiments, they investigated how grip adjustments are influenced by different perturbation times (early or late), the visibility of the moving hand, and different perturbation sizes (small or large). Results indicated that individuals execute corrections faster after late perturbations. The availability of visual information about the hand had minimal effect on the corrections, suggesting that feedforward mechanisms are involved. Moreover, participants achieved adjustments mainly by smooth changes of the aperture over time, contradicting the researchers' assumption that a new movement is programmed and superimposed.

Original languageEnglish
Pages (from-to)253-273
Number of pages21
JournalJournal of Motor Behavior
Issue number3
Publication statusPublished - May 2009


  • paper
  • feedback
  • feedforward
  • grasping
  • kinematics
  • online control
  • perturbation


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