Haptic after-effect of successively touched curved surfaces

Ingrid M L C Vogels*, Astrid M L Kappers, Jan J. Koenderink

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review


A flat surface is more often judged to be convex after the touching of a concave surface than after the touching of a convex surface. This haptic after-effect increases with the time of contact with the curved surface till it saturates, and it decreases with the time-lapse between the touching of the first surface and the next one. In this paper, the haptic after-effect of two successively touched spherically curved surfaces is investigated. It is found that both surfaces contribute to the after-effect, but the after-effect is not additive. The time course of the after-effect of two successive surfaces can be described by a first-order integrator with a single time constant of about 7 s and an amplitude equal to the difference between the saturation levels of the after-effects of the two surfaces when measured in isolation. The new saturation level is therefore equal to that of the after-effect of the most recently touched surface.

Original languageEnglish
Pages (from-to)247-263
Number of pages17
JournalActa Psychologica
Issue number3
Publication statusPublished - Feb 2001


  • After-effect
  • Curvature
  • Haptic


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